kumar
Most popular questions and responses by kumar
chemistry
The atomic mass of Eu is 151.96. There are only two naturally occurring isotopes of europium, 151Eu with a mass of 151.0 and 153Eu with a mass of 153.0. The natural abundance of the 131Eu isotope must be approximately
asked on March 29, 2010 
maths
Ram divided a sum of Rs.3873 among his three sons. His youngest son got 35% less than his oldest son who got 35% more than his second son. Find the share of his second son
asked on July 14, 2017 
maths
A teacher driving his vehicle at 24 kmph reaches her school 5 minutes late.If She had driven the vehicle 25% faster on an average she would have reached 4 minutes earlier than the scheduled time. How far is her school ?
asked on April 23, 2017 
maths
sinA+cosA=p and secA+CosecA=q then show that q[p^21]=2p
asked on February 28, 2018 
Sociology
The difference between positivism and anti positivism relates to: a. whether individuals like or dislike their society b. whether research methods use statistical data or persontoperson research c. whether sociological studies can predict or improve
asked on August 17, 2014 
maths
By increasing the speed of a car by 10km/hr the time of journey for a distance of 72 km is reduced by 36 min. Find the original speed of the car ?
asked on September 12, 2017 
maths
In a class of 50 students 25 take hindi and 16 take marathi.12 students take no languages. Find how many takes both hindi and marathi.
asked on November 30, 2018 
maths
A wheel revolves 1254 times in travelling a distance of 2kms 5 hectometers and 8 meters .find the circumference of the wheel .
asked on November 30, 2018 
MATH
missy and missy are messy sisters. their dresser drawer consists of 43 white socks, 2 black socks, 23 blue socks and 8 red socks. What is the minimum number of socks they must remove from the drawer to be certain they have four socks of the same color?
asked on February 13, 2013 
Math
4x+6y=1/8+3x+7y=1/10
asked on April 13, 2019 
maths
a woman is four times older than her daughter five years ago the product of their age was 175 find their present age
asked on March 5, 2018 
maths
sin^2 28*+ sin^2 62* + tan^2 38* cot^2 52*+ 1/4 sec^2 30* = ?
asked on February 4, 2018 
maths
If cosA + sinA= root2 cosA Show that cosA  sinA= root2 sinA
asked on February 28, 2018 
Chemistry
What is the pH of a buffer solution of 0.125M Acetic acid and 0.250M Sodium acetate? the Pk of Acetic acid is 4.76
asked on January 27, 2017 
maths
Prove that [1+cotACosecA] [1+tanA+secA] = 2
asked on February 28, 2018 
maths
Raman completes 50% of a wk in 10 days. Mohan then joins Raman on the 11th day and they together complete the remaining wk in 2 days.How long will take if the entire wk is entrusted to Mohan alone ?
asked on February 19, 2018 
maths
1.Without using Pythagorus theorm, prove that the points (4,3), (2,2),(8,2)are the vertices of a right angled triangle. 2. The 3 vertices of a parallelogram taken in order are (3,4),(2,3), (3,2).Find the coordinates of the fourth vertex ?
asked on January 28, 2017 
maths
A man covered a certain distance at some speed. Had he moved 3 kmph faster, he would have taken 40 minutes less. If he had moved 2 kmph slower, he would have taken 40 minutes more. The distance (in km) is:
asked on March 16, 2018 
maths
4 men & 6 women can complete a work in 8 days, while 3 men and 7 women can complete it in 10 days. In how many days will 10 women complete it?
asked on March 15, 2018 
maths
1.Without using Pythagorus theorm, prove that the points (4,3), (2,2),(8,2)are the vertices of a right angled triangle. 2. The 3 vertices of a parallelogram taken in order are (3,4),(2,3), (3,2).Find the coordinates of the fourth vertex ? can u pl
asked on January 28, 2017 
maths
A train travels 360 km at uniform speed . if the speed had been 5 km / hr more it would have taken 1 hour less for the same journey. find the speed of the train. pl give me a short cut method to solve.
asked on March 5, 2018 
maths
A flower garden has three times as many red roses as pink roses. Twice the number of red roses is equal to four times the number of pink roses increased by ten. How many red roses are there? How many pink roses are there?
asked on February 4, 2018 
maths
Tom has a total of 95 beads. He has 20 more red beads than blue beads. He has twice as many white beads as red beads. How many blue beads does Tom have?
asked on January 10, 2018 
maths
Find four numbers in AP whose sum is 20 and sum of whose squares is 120.
asked on November 8, 2017 
chemistry
For the reaction Al (s) + 3 HCl (aq) à AlCl3 (s) + ₃/₂ H2 (g), it was observed that when 4.00 g of aluminum reacted with excess HCl, exactly 30.0 kJ of heat were released. The DHo for this reaction is a) – 91.3 kJ b) – 120 kJ c) – 202 kJ d) –
asked on January 23, 2012 
maths
A and B entered into partnership with capitals in the ratio 4: 5. After 3 months, A withdrew ¼ of his capital and B withdrew 1/5 of his capital. The gain at the end of 10 months was Rs. 760. A's share in this profit is:
asked on October 4, 2018 
maths
If square of a number ends with 5,then its cube ends with 25 . Is the statement correct ?
asked on September 30, 2018 
maths
Prove SinA/1CosA = CosecA + CotA
asked on February 26, 2018 
maths
If the cost price of an item is 25% of its selling price , what is the % of profit ?
asked on February 19, 2018 
maths
A sum of money becomes 3 times of itself in 20 years. Find its rate of interest?
asked on July 30, 2017 
maths
An arithmetic progression has 10 terms. Sum of the 10 terms is 220. Sum of the odd terms is 100. Find the first term and common difference. pl give me the answer.
asked on July 17, 2017 
math
If y = 18x+5 is the regression line of x on y then the value of bxy is what ?
asked on May 19, 2013 
marketing
What resources does an International Internet retailer need other than merely a storefront on the Internet? Does it require fewer physical, financial, and human resources than a traditional retailer, or just as many? Explain.
asked on May 29, 2008 
maths
With a uniform speed a car covers a certain distance in 8 hrs. If the speed of the car is increased by 4 km per hour , the same distance can be covered in 7 1/2hrs.Find the distance covered ?
asked on February 19, 2018 
maths
At a flower shop , there was a total of 494 sunflowers and roses. After 2/5 of sunflowers and 57 roses were sold , the ratio of number of sunflowers to number of roses were 2:3. How many roses were there at first?
asked on February 4, 2018 
maths
Of three numbers, second is twice the first and is also thrice the third. If the average of three numbers is 44, find the largest.
asked on August 24, 2017 
maths
If a/b =c/d , show that a^3c + ac^3 = (a+c)^4   b^3d + bd^3 (b+d)^4 pl help.
asked on July 28, 2017 
maths
An arithmetic progression has 10 terms. Sum of the 10 terms is 220. Sum of the odd terms is 100. Find the first term and common difference. pl give me the answer. maths  Steve Monday, July 17, 2017 at 12:11pm 10/2 (2a+9d) = 220 5/2 (2a+4*2d) = 100 maths 
asked on July 19, 2017 
maths
A number on being divided by 10 and 11 successively leaves the remainders 5 and 7. Find the number.
asked on August 21, 2016 
MATH
Three circles, each with a radius of 10, are mutually tangent to each other. The area enclosed by the three circles can be written as abã−cƒÎ, where a, b and c are positive integers, and b is not divisible by a square of a prime. What is the value
asked on February 13, 2013 
math
(x/2)+(x/4)+(x/8)=(x(1/2)) variable domain {(5/7),(6/7),(4/8),(3/7),(2/7)
asked on November 17, 2010 
maths
A and B entered into partnership with capitals in the ratio 4: 5. After 3 months, A withdrew ¼ of his capital and B withdrew 1/5 of his capital. The gain at the end of 10 months was Rs. 760.Find A's share in this profit ? Anybody plz help me.
asked on October 5, 2018 
maths
A and B entered into partnership with capitals in the ratio 4: 5. After 3 months, A withdrew ¼ of his capital and B withdrew 1/5 of his capital. The gain at the end of 10 months was Rs. 760.Find A's share in this profit ?
asked on October 4, 2018 
maths
What time will a runner take to run a distance of 8 km at a speed of 15 km/hr?
asked on March 20, 2018 
maths
If [xy]^2=12 , and xy=2 . Find x^2+y^2. pl help.
asked on March 17, 2018 
maths
posted by kumar Thursday, March 15, 2018 at 11:51am. 4 men & 6 women can complete a work in 8 days, while 3 men and 7 women can complete it in 10 days. In how many days will 10 women complete it? maths  Reiny Thursday, March 15, 2018 at 1:50pm man's rate
asked on March 17, 2018 
maths
A and B can do a piece of work in 10 days, B and C in 15 days and A and C in 12 days. A,B and C work together to finish the work. If they are paid 15000, find the share of each?
asked on March 10, 2018 
maths
Show that [1+1/tan^2A][1+1/cot^2A] = 1/sin^2Asin^4A
asked on February 28, 2018 
maths
he sum of two numbers is 15 the sum of the squares of the same two numbers is 172 fined the difference between the two numbers
asked on February 27, 2018 
maths
X and Y can together complete a wk in 3 days. If X alone can complete the work in 9 days. In how many days can Y alone complete the work ?
asked on February 19, 2018 
maths
At what rate of % per annum, will the simple interest on a sum of money become 3/4 of the principal in 6 yrs ?
asked on February 19, 2018 
maths
20 % of [(7+53/12)6] = ?
asked on February 4, 2018 
maths
If 6men can do a piece of work in 20 days and one man can do a work of 2 boys.Find how many days can 10 men and 5 boys do the same work ?
asked on January 9, 2018 
maths
If a/b =c/d , a^3c + ac^3 = (a+c)^4 show that   b^3d + bd^3 (b+d)^4 pl help.
asked on July 28, 2017 
m
which of the following fraction is greater than 3/4 and less than 5/6.
asked on May 8, 2017 
maths
HELP ME PLEASE  +  +  = 30 [Using numbers 1,3,5,7,9,11,13 &15]
asked on September 4, 2016 
maths
A number on being divided by 10 and 11 successively leaves the remainders 5 and 7. Find the number. ie, x/10 = remainder 5 and x/11 = remainder 7. please help me to find the value of x.
asked on August 22, 2016 
english
Bill Gates didn't _______ ( seem )like a shoein for success after dropping out of Harvard and starting a failed first bussiness with Microsoft co founder Paul Allen ______ ( Call ) Traf O Data . While this early idea didn't work , Gates ' later , ______
asked on March 11, 2014 
pcm
sir ple. tell me how to make 9v dc motor how many coil turns i have to make.
asked on March 21, 2012

Math
3/10+2/100+6/1000
posted on October 5, 2018 
maths
ok
posted on October 4, 2018 
maths
SIR, HOW WILL U GET THE ANSWER ?
posted on October 4, 2018 
maths
Thank you sir.
posted on September 30, 2018 
Math
Non english books = 650*2/5=130*2=260 books.
posted on September 30, 2018 
maths
Given F1= 4 So F15= F1+14d=4+14d=2[F1+4d]=2F1+8d 4+14d=2*4+8d=8+8d 14d8d=8+4 6d=4 d=4/6=2/3 F12=F1+11d=4+11*2/3=4+22/3=12+22/3=10/3=3 1/3
posted on August 19, 2018 
maths
thank you sir.
posted on March 17, 2018 
maths
[xy]^2= x^2+y^22xy 12= x^2+Y^22*2 So, x^2+Y^2=12+4=16 Is this correct sir ?.
posted on March 17, 2018 
maths
ok. so 4 men & 6 women takes = 8 days, 3 men & 7 women takes = 10 days. and 10 women takes = 400 days. thankyou sir.
posted on March 17, 2018 
maths
posted by kumar Thursday, March 15, 2018 at 11:51am. 4 men & 6 women can complete a work in 8 days, while 3 men and 7 women can complete it in 10 days. In how many days will 10 women complete it? maths  Reiny Thursday, March 15, 2018 at 1:50pm man's rate
posted on March 17, 2018 
maths
I have one more doubt. if the work is same, then [ 4m+6w]8 = [3m+7w]10 32m+48w = 30m+70w 2m=22w : 1m=11w put it in equation 3m+7w=10 33w+7w=40w=10days so,10 women = 40 days. out of these 2 answers which one is correct ? Sir, plz advice.
posted on March 16, 2018 
maths
thankyou sir. sir, any other simple way to solve this pblm.
posted on March 16, 2018 
maths
ok. Thank you sir. I have a doubt. 4m+6w=8 ........[1] 3m+7w=10 ......[2] [2]*4 = 12m+28w=40 [1]*3 = 12m+18w=24 ......................................... [2][1]= 0 + 10W = 16 Days. Is it correct ? plz advice.
posted on March 16, 2018 
maths
Thankyou very much sir.
posted on March 12, 2018 
maths
yes. I Got the answer. 10 and 40. Thankyou. Sir,any short cuts for solving this pblm.
posted on March 5, 2018 
maths
pl help
posted on February 26, 2018 
Math
a+b=1250 a+c=1060  2a+b+c =2310  b+c =1830  2a =480 a =240 240+b =1250 b =1010 240+c =1060 c= 820.
posted on February 4, 2018 
maths
ok.I got it. 20% of 5 is 1. so 1+ 46 = 47. option [d].
posted on February 4, 2018 
maths
5+ 8 [(121/4)6] 5+ 8 [481/4) 6] 5+ 8 [47/46] 5+ 8 [4724/4] 5+ 8 [23/4] 5+ 8*23/4 5+ 46 = 51 ??
posted on February 4, 2018 
maths
sorry . correction in the question. 20 % of 5+ 8 [(7+53/12)6] = ? Plz help. Ans. [a] 89 [b] 84 [c] 44 [d] 47
posted on February 4, 2018 
maths
If the smallest number is x. 3x + [3x3] + x = 35>
posted on September 24, 2017 
maths
Thank u sir.
posted on August 24, 2017 
maths
pl explain how can we find z. what is the answer.
posted on August 24, 2017 
Maths
if bundle means basket,then number of books = 144 * 100 = 14400
posted on July 30, 2017 
MATH
Take LCM of 18,25,and 35 = 3150 multiplied by 3 = 3150 * 3 = 9450
posted on July 30, 2017 
maths
sorry.its my mistake. 10/2(2a+9d)=220 5 (2a+9d)=220 (2a+9d)=220/5=44..........[1] 5/2(2a+4x2d)=100 2.5(2a+8d)=100 (2a+8d)=100/2.5=40.......[2] [1][2]=d=4 :. 2a+32=40 a=4
posted on July 19, 2017 
maths
sir, I get the answer First term = 18.4 common difference = 4/5 is it correct ?
posted on July 18, 2017 
Physics
Question
posted on June 28, 2017 
math
Following Ms.Sue's steps the answer =33  23 = 10 & = 49/42  24/42 = 25/42. So ie. = 10 25/42.
posted on September 4, 2016 
Algebra
116cm  40 = 76cm. 76cm/2 = 38cm. length of 1st pieces = 38cm. length of 2nd pieces = 38cm+40cm =78cm
posted on September 4, 2016 
math
X+y= 62 2x+y = 41  2x+2y= 124 2x+y= 41     Y= 175
posted on September 28, 2015 
waste water treatment
Screen Grit chamber Primary sedimentation Anaerobic tank Anoxic tank Aerobic tank Final clarifier Sludge dewatering
posted on March 20, 2015 
waste water treatment
Q2: The maximum sludge concentration in the return flow will increase, reducing biomass storage in the final clarifier during rwf, decreasing the chance for biomass wash out. The biomass concentration in the aeration tank can increase, which could lead to
posted on March 20, 2015 
water treatment
What is the main advantage of a lower SVI? The maximum sludge concentration in the return flow will increase, reducing biomass storage in the final clarifier during rwf, decreasing the chance for biomass wash out. The biomass concentration in the aeration
posted on March 20, 2015 
water treatment
What is correct for the aerobic granules of a Nereda system: Denitrification takes place inside the granule Due to reduction of oxygen in the outer layer, anoxic conditions will exist inside the granule Aerobic granules make settling tanks superfluous
posted on March 20, 2015 
waste water treatment
QUESTION 2C1: Calculate V in m/s is 1.22 QUESTION 2C2: Calculate at which open screen area (m2) this velocity is reached  0.34 Calculate what percentage of the clean free space is clogged ... 32 QUESTION 2D1: Determine how many parallel channels 4 What
posted on March 20, 2015 
Water Treatment
The answers given by "Water Treatment  Ham, Sunday, November 24, 2013 at 10:24pm" is correct  Thanks Dear
posted on March 20, 2015 
Chemistry
works
posted on January 26, 2015 
Sociology
I thought the same too but I was not sure. That was why I asked here. Thanks!
posted on August 17, 2014 
Physics
0.001 is wrong @MARC , did u got green check with that value ??? plz help ???
posted on December 16, 2013 
Physics
hai anonymous ,i stuck on dis question if u done for it plz help ???
posted on December 16, 2013