Saturday

December 10, 2016
Number of results: 150,396

**Physics**

Which of the following statements about SI distance units is not correct? 1) Both a meter and a kilometer are SI units. 2) A mile is not an SI unit. 3)A meter currently has a universal unit definition. 4)Converting a meter to feet is an example of a conversion involving two ...

*September 1, 2012 by Zhady*

**Calculus, antiderivatives**

A student accelerates from rest at a rate of 3 miles/min^2. How far will the car have traveled at the moment it reaches a velocity of 65 miles/60 min? a(t) = 3 miles/min^2 so v(t) = 3t + k miles/min but when t=0, v=0 so k=0 then v(t)=3t d(t) = 3/2 t^2 + c but when t=0 d, the ...

*April 5, 2007 by Andrea*

**Math**

A truck can be rented from Basic Rental for $45.00 a day plus $0.25 per mile. Continental charges $25.50 per day plus $0.40 per mile to rent the same truck. a) Write an expression to calculate the cost of renting and driving a truck from Basic Rental. Let x be the number of ...

*October 5, 2015 by Dustin*

**Algebra**

An elephant herd started moving at a rate of 6 mph. One elephant stood still and was left behind. Then the stray elephant began running at a rate of 10 mph to reach the herd. The stray caught up in 5 minutes. How long (in hours) did the stray run to catch up? How far did it ...

*October 10, 2006 by Steve*

**Math**

Renting a truck cost $30 per day and 22 cents per mile when the driver goes beyond the 23 miles a lot of per day. How much wood Tabitha pay when renting a truck for 3 days and driving a total of 210 miles?

*July 14, 2015 by Tara*

**11th grade**

Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 236 miles and a perigee of 215 miles above the surface of Earth. Use the rule of thumb that below an altitude...

*December 16, 2010 by Vanessa*

**Math**

The speed of a metro train is 54 km/hr excluding stoppage time and if including stoppage the speed is 45 km/hr then for how many minutes does it stop per hour ?

*June 17, 2006 by elangovalan*

**Math**

Connor ran around the 1/4-mile track 15 times! Express the distance he ran as a mixed number.

*September 23, 2015 by Helen*

**Science**

A car traveled at an average speed of 60 mph for two hours. How far did it travel? A. 30 miles B. 60 miles C. 120 miles D. 150 miles

*December 4, 2012 by Layla*

**Algebra 1**

It takes a lot of snow ofr the federal government in Washington D.C. to shut down, but even they experienced a two-hour delay last Friday. This is to allow people to take it slow in thier way to work. A commute to work that usually takes someone 24 minutes traveling at an ...

*February 7, 2008 by Libby*

**physics**

how much would a stationary vehicle have to accelerate in order for it to catch up to another vehicle traveling 74 miles per hour in a distance of .5 miles? what would its final speed be?

*November 30, 2012 by kelso*

**trig**

A skateboard wheel has a radius of 2.08 inches and is turning at a rate of 945 rpm. a. what is the angular speed in radians per second? in degrees per second? b. how fast is the skateboard traveling (in miles per hour)?

*September 26, 2015 by Mohamad*

**physics**

A car is moving at 53 miles per hour. The kinetic energy of that car is 5 × 105 J. How much energy does the same car have when it moves at 102 miles per hour? Answer in units of J HELP!!!! I've tried doing (5*10 J)* (102/53)^2 and I keep on getting it wrong PLEASE HELP ME ...

*December 14, 2014 by Edgar*

**Algebra-help**

12. A train traveled at a constant speed for 6 hours. The train traveled 225 miles in those 6 hours. What was the speed, in miles per hour, of the train? answer: 37.5 Is that correct? Thank You

*February 1, 2013 by Brendon*

**Math**

A bicyclist is traveling at an angular speed of 8pi radians per second. How fast is she traveling in miles per hour if her tires are 28 inches in diameter?

*February 22, 2016 by Anonymous*

**Math**

A motorist makes a journey of 240 km from Singapore to Malacca to visit his inlaws at an average speed of x kilometers. On his return journey, his average speed is reduced by 6km/hour due to traffic. If the return journey takes 20 minutes longer, form an equation with x and ...

*December 10, 2012 by Elizabeth*

**Math**

Antoine paid $7.47 for 3 pounds of grapes. Write the cost of the grapes as a unit rate. Carla's family drove 420 miles in 8 hours. Write their average speed as a unit rate. Please help me!

*January 9, 2014 by Anonymous*

**mat115**

A pack of 250 key blanks costs $23.50. What is the unit price? I know that this is .094 but I am having trouble with the remaining 2 parts. If each cut key costs a customer $1.75, and it takes 2 minutes for Darren to cut a key, how much does Darren make per hour? If Darren, as...

*August 28, 2010 by Gina*

**eco**

during2004 the national average gas price rose from $1.50 a gallon to $2.25 a gallon. the government has stated that the high price of gas will remain as it is. discuss how this cost influences your decision to buy a new car. based on your budget, would you buy the large car ...

*June 26, 2007 by tracey*

**calculus**

an airplane is flying at an altitude of 6.7 miles towards a point directly over an observer. if the speed of the plane is 499 miles per hour, find the rate at which the angle of observation, Ɵ, changing by at the moment when the angle is 21 degrees.

*October 16, 2011 by Mindy*

**Maths**

Any help with the following would be greatly appreciated. I don't understand how to use the information given to create the equation. 1) A car travels between A and B at an average speed of 60 km/h. If the car increased its average speed to 100 km/h it would take 10 minutes ...

*April 21, 2010 by Sindy*

**Math**

A swimming pool is drained at the end of each summer. Fifteen gallons of water are removed per minute. How much does the amount of water in the pool change in one hour? (There are 60 minutes in one hour.)

*November 6, 2015 by Animegirl*

**college physics**

the speed of light is about 3.00 x 10^8 m/s. convert this figure to miles per hour

*September 7, 2008 by corey*

**astronomy **

what is the speed of a point on the equator in miles per hour as the earth rotates on its axis?

*September 10, 2011 by katy*

**Algerbra**

Can anyone help me on these two problems also. I am getting so confused and tired. The length of a rectangle is fixed at 27cm. What lengths will make the perimeter greater than 100cm? also this problem Trians A and B are traveling in the same direction on parellel tracks. ...

*January 25, 2009 by Kim*

**Math**

If it takes B hours to walk a certain distance at the rate of 3 miles per hour, the number of hours it takes to return the same distance at 4 miles per hour is...?

*August 14, 2015 by Victoria *

**PHYSIC**

A PLANE IS TRAVELING AT 90 MILES PER HOUR DUE SOUTH. WHAT DO WE KNOW ABOUT IT? 1. ITS SPEED 2. ITS VELOCITY 3. BOTH ITS SPEED AND ITS VELOCITY

*January 14, 2012 by GRISSELL*

**Physic**

A plane is traveling at 90 miles per hour due south. What do we know about it? the speed, its velocity or both its speed and its velocity?

*January 14, 2012 by Eddie*

**Math**

Shannon Cron ran 18 miles in 5 days. How many miles would she run in 9 days if she ran at the same rate?

*March 8, 2016 by Lainey*

**math**

you commute 63 miles one way to work. the trip to work takes 20 minutes longer than the trip home. your avarage speed on the trip home is 12 mph faster. What is your average speed on the trip home?

*November 7, 2010 by john*

**Algebra**

Walk 1 or 2 miles. Check the time before starting your walk and at the end of your walk. Determine your walking rate in minutes per mile. Create an equation that describes this rate.

*January 18, 2016 by JamarLavine*

**statystics**

: Human Resources took a survey and found that the average commute time one way is 25.4 minutes. However one of the executives feels that the commute is less. He randomly selects 25 commuters and finds that the average is 22.1 minutes with a standard deviation of 5.3 minutes. ...

*April 15, 2010 by Adela*

**adv pre algebra**

the temperature of a substance increases by 10 degrees celsius in 5 minutes. write this as a unit rate. then convert into degrees fahrenheit per hour.

*January 9, 2011 by Anonymous*

**calculus**

Given ensuing information, determine the least cost and the least cost mix of on- and off-shore pipe. The intake facility is in the water 2 miles vertically north of the shoreline The water filtration plant is on land 1 mile vertically south of the shoreline The intake and ...

*May 8, 2013 by James*

**trigonometry**

A truck with 48-in.-diameter wheels is traveling at 55 mi/h. Find the angular speed of the wheels in rad/min, *hint convert miles to inches & hours to minutes: __rad/min How many revolutions per minute do the wheels make?__ rpm

*March 15, 2013 by marie darling*

**MATH MS. SUE**

1. Sarah’s mother has a miniature village modeled after her home town. The model is 10 feet long and 7 feet wide. The actual village is 7 miles long. What is the village’s actual width? If necessary, round to the nearest tenth of a mile. A. 4.9 miles B. 10 miles C. 1 mile ...

*December 8, 2016 by Steve*

**Algebra**

How do I convert 40 miles per hour into miles per second?

*November 17, 2008 by Sam*

**trig**

An airplane is traveling at a speed of 724 km per hour at a bearing of N30°E. If the wind velocity is 32 km per hour from the west, find the resultant speed and direction of the plane.

*February 23, 2015 by Lin*

**Accounting**

In the table given below, reconstruct the remaining information using the available data. [ WHERE THE X's ARE] All of the raw material purchased during the period was used in production. (Indicate the effect of each variance by selecting "Favorable" or "Unfavorable". Select "...

*November 17, 2015 by Sara*

**Quick math help**

A car rental is $65 per day plus $0.45 per mile travelled. Determine the equation of the line that represents the daily cost by the number of miles traveled. If a total of 450 miles was travelled in one day, how much is the rental company going to receive as a payment? ...

*December 11, 2013 by Anonymous*

**math**

Suppose you are looking for a job. You interview with a company that has 10 general employees each make $100 per day, 7 assistants each make $400 per day, 3 managers each make $900 per day, and the owner who makes $1900 per day. The interviewer tells you that the average ...

*January 23, 2012 by Anonymous*

**Math, Pre-Calculus.**

A postal airplane leaves lsland A and flies 91 miles to Island B. It drops off and picks up mail and flies 63 miles to lsland C. After unloading and loading A- mail, the plane returns to lsland A at an average rate of 300 miles per hour. How long does it take the pilot to ...

*April 28, 2016 by Daniel López*

**MATH**

SHELDON CAN RUN A MILE IN 6 4/5 MINUTES, HOW MANY MILES CAN HE RUN IN 30 MINUTES.

*December 16, 2014 by MICHELE*

**math**

Here is the information for two pay-as-you-go cell phone companies, On Call- 3.5 hours: $10 Talk Time- 1/2 hour: $1.25 1)What is the unit rate in dollars per hour for each company? 2)Which company offers the best deal? Explain your answer. 3)Another company offers a rate of $0...

*October 6, 2015 by Tim*

**math**

Runnign at a consant speed, Andrea covers 15 miles in 2 and half hours. At this speed, how many minutes will it take her to run 2 miles?

*April 15, 2009 by Anonymous*

**Easy Math??**

Carol started from home on a trip averaging 30 miles per hour how fast must her mother drive to catch up to her in 3 hours if she leaves 30 minutes after Carol? Use an equation to solve your work. a.35 mph b.39 mph c.40 mph I heard that the answer is a, but I don't know how to...

*July 30, 2015 by Ryan*

**math word problems**

(24 cents) per mile. Toyotas rent for $31 per day and $.19 (19 cents) per mile. Write a cost equation for each rental car. Would the equation be in the form of y = mx + b y = .24x + 25 y = .19x + 31 The second one looks ok to me. All of the information from the first problem ...

*August 20, 2007 by Michelle W.*

**9th grade**

Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 mile per hour and train B is traveling at 125 mile per hour. Train A passes a station at 3:15pm. If train B passes the same station at 3:27 pm at what time will train B catch up ...

*March 10, 2010 by Kimmie*

**finance management **

You are going to open a business making custom cabinets. You can sell each cabinet for $80. It takes a cabinetmaker approximately 45 minutes to make one cabinet. Each cabinetmaker works an 8-hour day earning $18 per hour. Each cabinet uses $25 in raw materials. You usually ...

*August 7, 2016 by sandra*

**Math**

Global Telephone charges 30 dollars for monthly phone service, plus a long distance calling rate of 15 cents per minute. After an hour of long distance calling charges,the rate drops to just 5 cents per minute for additional long distance calls. What will the monthly bill be ...

*August 2, 2011 by Kris*

**math (algebra) **

A construction crew built 6 miles of road in 2/7 days. what is the unit rate in the miles per day? Deon drove 469 miles in 7 hours. At the same rate, how long would it take him to drive 806 miles?

*October 30, 2015 by Anonymous*

**Math**

Jan, Mya, and Sara ran a total of 64 miles. Jan and Maya ran the same amount and Sara ran 8 less then Maya. How many miles did Sara run?

*April 4, 2012 by Jackie*

**calc**

A train travels from city A to city B. The cities are 600 miles apart. The distance from city A at t hours after the train leaves A is given by d(t) = 50t + t^2. What is the average velocity of the train in miles per hour during the trip from A to B?

*February 6, 2010 by h*

**Math plz help me!!! URGENT!!**

1. Write the ratio in the simplest form. 16:24 (1 point) 1:2 4:3 3:4 2:3 2. Solve the following proportion. (1 point) p = 2 p = 8 p = 12 p = 24 3. A recipe calls for 2 cups of sugar to make 2 dozen cookies. Use the proportion to calculate how much sugar is needed to make 6 ...

*November 22, 2013 by jhubijn*

**math**

6c=___pt Can someone show me steps please? You look up the conversion factor. There are two ways it can look; i.e., 2 cups = 1 pint OR 1 pint = 2 cups. Here is the way to do ALL conversions. ??pts = what you are given x conversion factor. ??pts = 6 cups x factor. So how do we ...

*November 30, 2006 by brooke*

**math**

define a variable and write an equality for each situation the maximum speed allowed on main st is 25 miles per hour a trainer advises an athlete to keep rate under 140 beats per minute

*October 13, 2012 by anonymous*

**history**

What was the main result of the invention of the Clermont in 1807? This steamboat built by Robert Fulton helped speed up industrialization and increase interest in canal and river transport. This passenger train built by Henry Ford provided immigrants an easier way to move ...

*April 15, 2016 by abby*

**math (statistics)**

Suppose you are looking for a job. You interview with a company that has 10 general employees each make $100 per day, 7 assistants each make $400 per day, 3 managers each make $900 per day, and the owner who makes $1900 per day. The interviewer tells you that the average ...

*January 23, 2012 by juan777*

**math**

If a boat can travel on the lake at 15 miles per hour, and it took 25 minutes to cross the lake, how many miles it took to cross the lake/

*January 19, 2011 by Timmy Adams*

**Algebra**

How would you set up problem: your average rate traveling uphill was 2.2 kilometers per hour and average rate downhill was 3.3 kilometers per hour. If he spent a total of 12 hours hiking, how long was the trail?

*October 11, 2012 by Ellen P*

**Pre-Calc.**

Alice walks on a straight line at four miles per hour. Two hours after she begins walking, Bob runs after her at a rate of six miles per hour. How many hours does it take for Bob to catch up to Alice?

*October 12, 2016 by 123*

**math**

A train leaves the station at 9:00 pm traveling east at 36 miles per hour. A second train leaves the station at 10:00 pm traveling west at 42 miles per hour. At what time will both trains have traveled the same distance? I need help solving it :)

*October 4, 2012 by ash*

**algebra**

A train leaves the station at 9:00 pm traveling east at 36 miles per hour. A second train leaves the station at 10:00 pm traveling west at 42 miles per hour. At what time will both trains have traveled the same distance? I need help solving it :)

*October 4, 2012 by ash*

**physics**

Suzanne bikes 3 km to school every day. It takes her 20 minutes because she always has to stop at a traffic light. What is her average speed? A. 0.15 km/s B. 3 m/s C. 6.7 km/minute D. 9 km/h i keep picking A and C and getting this wrong. i know this is the formula: s = d/t but...

*September 13, 2014 by forrest*

**Precalc**

A vehicle has an engine that is connected directly to a gear box. In the highest gear, a 2 inch radius gear is turning a 14 inch diameter gear. This gear is connected to the drive shaft. The drive shaft attaches to a wheel and a tire that measures 2 and 1/3 feet in diameter. ...

*February 10, 2014 by John*

**Precalculus**

A vehicle has an engine that is connected directly to a gear box. In the highest gear, a 2 inch radius gear is turning a 14 inch diameter gear. This gear is connected to the drive shaft. The drive shaft attaches to a wheel and a tire that measures 2 and 1/3 feet in diameter. ...

*September 14, 2015 by Heather*

**algebra**

Her average rate traveling uphill was 1.8 kilometers per hour and her average rate down hill was 4.2 kilometers per hour. If she spent a total of 16 hours hiking, how long was the trail?

*October 25, 2011 by Anonymous*

**Math**

A train is 1 mile long and is going through a tunnel a mile long, if the train is going 15 miles per hour, how long will it take 4 the train to get completley through the tunnel?

*August 27, 2007 by Lindsey*

**algebra**

Which of the following is the most appropriate unit to describe the time you can drive a car based on the amount of gas? Minutes per gallon, because the independent quantity is the gallons Minutes per gallon, because the independent quantity is the minutes Gallons per minute, ...

*September 3, 2015 by oscar*

**math**

A boat traveling downstream a distance of 39 miles then came right back.If the speed of the current was 12 mph and the total trip took 4 hours 20 minutes,find the average speed of the boat relative to the water.

*February 1, 2014 by russ*

**Algebra**

You drive 129 miles along a scenic highway and then take a 29-mile bike ride. Your driving rate is 4 times your cycling rate. Suppose you have no more than a total of 5 hours for driving and cycling. Let x represent your cycling rate in miles per hour. Write a rational ...

*November 16, 2015 by Sara*

**algebra**

a van moves with a constant speed of 40 miles per hour. How far can it travel in 2 hours?

*December 22, 2014 by brea*

**Math**

if a bullet travels at 645.0m/s, what is its speed in miles per hour? can you please show me how to solve this?

*September 10, 2015 by Alex*

**Math**

Terrance is traveling at a speed of 55 miles per hour. At this rate, how far will he travel in 2.3 hours?

*April 2, 2016 by Lily*

**algebra**

train A and B are traveling in the same direction on parallel tracks. train A is going 80 miles per hour train B is going 84 miles per hour. train A past a station at 2:15 am train B passes at 2:45 am what time will train B catch train A

*October 21, 2010 by brian*

**math**

A hot-air balloon, headed due east at an average speed of 15 miles per hour and at a constant altitude of 100 feet, passes over an intersection. Find an ex[ression for the distance d (measured in feet) from ballon to the intersection t seconds later. 1'000 FEET HIGH

*January 24, 2007 by John*

**Math help**

d=0.005s^2+0.2s where d is the stopping distance in meter and s is the speed in km per hour. use the formula to find the stopping distance when a car is travelling at 70km per hour. my answer is 38.5 is that right.

*June 18, 2010 by Tim*

**math,help**

Also, can someone set this problem up into equations so i can solve.thanks A plane took 1 hour longer to travel 560 miles on the first portion of a flight than it took to fly 480 miles on the second portion. If the speed was the same for each portion, what was the flying time ...

*April 20, 2007 by jasmine20*

**trig**

A ship is headed due north at a constant 20 miles per hour. Because of the ocean current, the true course of the ship is 15°. If the currents are a constant 18 miles per hour, in what direction are the currents running? (Enter your answers as a comma-separated list. Round ...

*November 16, 2012 by janice*

**precalculus**

Gloria is planning to ride her bicycle near the transmitter of a radio station. She will be riding from a point 10 miles due east of the transmitter on a straight road to a point 40 miles west and 10 miles north of the transmitter. She has a radio on her bicycle which can pick...

*June 10, 2013 by Anonymous*

**Intermediate Algebra**

I am rowing on a river between two cities that are 19 miles apart. When going downstream, I make the journey in .76 hour(s). When I return upstream, it takes me 2.11 hour(s). What is the current of the river? what is the speed I would row in still water?

*March 8, 2016 by Jaunice*

**Statistics**

The average amount of time people spend on facebook each day is 71 minutes, with a standard deviation of 4.7 minutes. Are you more likely to select a random person that spends less than 68 minutes per day, or a group of 35 people that spend on average less than 65 minutes per ...

*November 15, 2012 by Ashley*

**algebra 1**

a tortoise can travel 10 cm per second. what is the tortoise's speed in feet per hour? an 18,000 gallon pool takes approximately 40 hours to fill. what is this rate in pints per mintue. a tub can drain 24 gallons of water in 5 minutes . what is this rate in cups per second? i...

*September 9, 2015 by sahsa to reiny*

**help!!!!!!!! Physics**

A microbiologist measures the speed of a swimming bacterium. The bacterium covers a distance of 2.16 microns in 5.0 seconds. The biologist wished to compare the speed of the bacteria with other animals, but the speeds of other animals are listed in kilometers per hour. What is...

*September 29, 2013 by Mary*

**geometry**

Two ships leave a harbor at the same time, traveling on courses that have an angle of 140 degrees between them. If the first ship travels at 26 miles per hour and the second ship travels at 34 miles per hour, how far apart are the two ships after 3 hours?

*November 4, 2010 by Rac*

**Math**

You invent a new system to make excellent racing tires for the Indianapolis 500/ Your tires are good for an average of 105 miles, with a standard deviation of 7.5 miles. What is the probability that one of your tires can go for at least 44 laps? What is the probability that ...

*July 10, 2012 by Lindsey*

**Plane Trigometry**

You observe a plane approaching overhead and assume that its speed is 550 miles per hour. The angle of elevation of the plane is 16 degrees at one time and 57 degrees one minute later. Approximate the altitude of the plane.

*February 14, 2013 by Horum*

**Mileage/graph**

I tried this and needed to graph. But, I want to find out what I did incorrect. Suppose that a car rental agency gave you the following choices. Option A: $30 per day plus 40 cents per mile. Option B: flat $50 per day (a) Write equations for cost per day c for options A and B...

*January 23, 2012 by Algebra88*

**physics wave**

A) Show that the average rate with which energy is transported along a cord by a mechnical wave of frequency f and amplitude D is: P(average) = 2(pi^2)u v(f^2)(D^2) v is speed of the wave u is the mass per unit length (M/L) B) If the cord is under a tension Ft =100 N and has ...

*May 1, 2008 by Anonymous*

**math**

Renting a truck costs $55.00 per day and $0.38 per mile when the driver goes beyond the 40 free miles allotted. How much would Samantha pay when renting the truck for 2 days and driving a total of 94 miles?

*August 14, 2016 by bird*

**physics**

Student throws a baseball at a large gong 79 miles away and hears the sound of gong 2.63333 seconds later. The speed of sound in air is 330 miles per second. What was the average speed of baseball on its way to gong ?

*September 3, 2014 by Megan*

**math**

josh ran for 56 minutes and walked for 16 minutes. What is the ration of the number of minutes ran to the number of minutes walked?

*November 1, 2015 by sam*

**algebra**

A rental truck costs $50 plus $0.40 per mile. Write an equation that gives the cost of driving the truck x miles Use the intersection of graphs method to determine the number of miles that the truck is driven if the rental cost is $70.

*February 13, 2016 by Dee*

**Business **

At an activity level of 8,800 units, Pember Corporation's total variable cost is $146,520 and its total fixed cost is $219,296. For the activity level of 8,900 units, compute the following values. Required: A. The total variable cost B. The total cost C. The average variable ...

*December 29, 2015 by Victoria*

**Algebra II**

A runner completes a 16 mile trip, running 8 miles uphill and 8 miles downhill in a total of 4 hours, if his uphill speed is 3 mph slower than his downhill speed, find his downhill speed.

*November 15, 2012 by John*

**math**

car rental is 36.00 day, 100 miles free for each day of rental plus .20 per mile for each mile over allowance and i went 450 miles total how much is total for rental car

*July 4, 2015 by julie lockhart*

**10th grade**

Two ships leave a harbor at the same time, traveling on courses that have an angle of 140 degrees between them. If the first ship travels at 26 miles per hour and the second ship travels at 34 miles per hour, how far apart are the two ships after 3 hours?

*November 4, 2010 by Rac*

**Math**

*not multiple choice* u^-3 = 1/125 y - 1 = 4y - 2/3 * not sure how to do this what is the y intercept of the line? y= -3x - 5 * my answer is 5 when 40 is added to the number miles she ran last week..the result is the same as adding 10 to 4 times the number she ran last week...

*December 17, 2014 by Anonymous*

**College math**

A planehas 7 hrs. to reach a target and come back to base. it flies out to the target at 480 miles per hr. and returns on the same route at 640 miles per hour. how many miles from the base is the target?

*January 20, 2009 by Kim*

**math**

Aryan has to travel certain distance from his home at a speed of 5 kilometre hours on his way back to home the speed decreases to 3 kilo metre per hour find his average speed.

*December 21, 2015 by Balram *