Vivek
Most popular questions and responses by Vivek
Maths Mensuration
Prove that the area of a circular path of uniform width h surrounding a circular region of radius r is pi h (2r+h)
asked on August 21, 2016 
Maths Algebra
The size of a red blood cell is 0.000007 m and that of a plant cell is 0.00001275 m.Show that a red blood cell is half of plant cell in size
asked on August 17, 2016 
Maths Mensuration
The inner circumference of a circular track is 220 m.The track is 7 m wide everywhere.Calculate the cost of putting up a fence along the outer circle at the rate of $2 per metre.
asked on August 19, 2016 
Maths Mensuration
The length and breadth of a park in the ratio 2:1 and its perimeter is 240 m. A path 2m wide runs inside it,along its boundary.Find the cost of paving the path at Rs 80 per square metre?
asked on September 20, 2016 
math
Triangle ABC , BC = CD and (angle ABC  angle bac ) =30, the measure of angle and is?
asked on February 25, 2016 
Maths Profit and Loss
By selling 125 cassettes,a man gains an amount equal to the selling price of 5 cassettes. Find the gain%.
asked on August 19, 2016 
Maths Algebra
A steamer goes downstream and covers the distance between two ports in 4 hours while it covers the same distance upstream in 5 hours.If the speed of the stream is 2 km/h.Find the speed of steamer in still water.Check your solution.
asked on August 19, 2016 
Maths Compound Interest
In a experiment the count of bacteria was increasing at the rate of 2.5% per hour. Initially, the count was 512000.Find the bacteria at the end of 2 hours?
asked on August 19, 2016 
Maths Mensuration
A field in the form of a parallelogram has base 15 dam and altitude 8 dam.Find the cost of watering the field at the rate of 50 paise per square metre???????Please help to solve this????????????????
asked on August 20, 2016 
Maths Pie chart
In the pie chart representing the percentages of students having interest in reading various kinds of books,the central angle of the sector representing students reading novels 81°. What is the percentage of students interested in reading novels?
asked on August 19, 2016 
Maths Algebra
A sum of Rs 8400 is made up of 50,20,10 and 5 rupee notes.The number of 10 rupee notes is five times the number of 5 rupee notes, four times the number of 20 rupee notes and ten times the number of 50 rupee notes.What is the number of notes in each
asked on August 19, 2016 
Maths Percentage
Find the percentage of pure gold in 22carat gold, if 24carat gold is 100% pure gold.
asked on September 24, 2016 
math
In how many ways a selection can be made of atleast one fruit of 5 bananas, 4 mangoes and 4 almonds
asked on February 23, 2016 
physics (motion)
the initial velocity of a particle is u (at t=0) and acceleration f is given by at.which relation is valid: (a)v=u+at^2 (b)v=u +at^2/2 (c)v=u+at (d)v=u
asked on June 23, 2014 
physics
What is force defin it
asked on January 2, 2012 
Maths Exponents
(1) 11×10^5 .Express it in scientific notation. (2)The distance between sun☉ and earth🌎 is (1.496×10^11)m and the distance between earth 🌎 and moon 🌙 is (3.84×10^8)m.During solar eclipse moon comes in between earth and sun.At that time what
asked on September 17, 2016 
Maths Algebra
Half of a herd of deer are grazing in the field and threefourths of the remaining are playing nearby.The rest 9 are drinking water from the pond.Find the number of deer in the herd.
asked on August 19, 2016 
Maths Percentage
The value of a machine depreciates every year by 10%.If the present value of the machine is Rs 54000,what was its value last year?
asked on August 19, 2016 
Maths Compound Interest
In what time will Rs 1000 amount to Rs 1331 at 10% per annum, compounded annually?
asked on August 19, 2016 
Maths Profit and Loss
The cost price of 12 candles is equal to the selling price of 15 candles . Find the loss%.
asked on August 19, 2016 
Maths Algebra
The diameter of Sun is (1.4 ×10^8)m and the diameter of Earth is (1.2742×10^4)m . Show that the diameter of sun is nearly 100 times the diameter of Earth.
asked on August 19, 2016 
Physics
The typical lifetime of a star like our Sun is 10 billion years. While a star like our Sun is able to generate energy in its core (through fusion) the thermal pressure balances the gravitational pressure from the Sun’s mass. However, once the star rules
asked on November 23, 2015 
james knox polk
how did he become famous? http://www.whitehouse.gov/history/presidents/jp11.html
asked on January 21, 2007 
Math
A rectangular Park of length 80m and width 65m has two paths of uniform width 2.5m crossing each other. Find the area of remaining portion.
asked on January 28, 2017 
Maths Algebra
In a Library stack there are 4 books each of thickness 24 mm and 6 paper sheets each of thickness 0.015 mm. What is the total thickness of the library stack in scientific notation?
asked on August 19, 2016 
Maths Profit and Loss
Oranges are bought at 6 for Rs 10 and sold at 4 for Rs 9. Find the gain% or loss%.
asked on August 19, 2016 
Science
a stone mass of 2.5kg is falling a certai height. Find the force of attraction between the earth and the stone. Also find its acceleration
asked on October 1, 2016 
Maths discount%
Find the single discount equivalent to two successive discounts of 20% and 10%.
asked on August 20, 2016 
Physics
A round object with mass m and radius R rolls down a ramp that makes an angle θ with respect to the horizontal. You can assume there is static friction so that the object rolls without slipping. a) For now, take the moment of inertia of the object to be I
asked on November 23, 2015 
jdt trignometric
tan¦È=7/24 then prove that ¡Ì(1cos¦È/1+cos¦È)=1/7 WHERE 0
asked on June 21, 2015 
Science
What is comet how it fall and why he look blue
asked on February 25, 2012 
physics
what is the angular speed of one satellite as seen by an astronaut in another satellite?
asked on February 21, 2012 
chemistry
The label of a spread says that it contains, per 100 g product: 80 g fat; 20 g saturated fat. What is the percentage of saturated fatty acids expected in the fat extracted from this spread? 25% 80% none of these 20% 16%
asked on February 24, 2011 
chemistry
To make 10 mL of 25 mM sodium standard, what volume of 1 M NaCl stock should be used? 250 mL 2.5 mL 0.25 mL 0.5 mL None of these 400 mL
asked on February 24, 2011 
chemistry
To make 10 mL of 25 mM sodium standard, what volume of 1 M NaCl stock should be used? 250 mL 2.5 mL 0.25 mL 0.5 mL None of these 400 mL
asked on February 24, 2011 
Physics
A car reaches a speed of 40m/s from rest in a time of 8 seconds. After the 8 seconds, the car travels at a constant velocity fro 200meters when it runs out of gas. The car slowly comes to rest 30 seconds after running out of gas. Calculate acceleration for
asked on October 25, 2010 
physics
an object of mass 2 kg attached to wire length 5 cm is revolved in a horizontal circle if it makes 60rpm find angular speed
asked on June 22, 2017 
Maths Percentage
Due to an increase in the price of sugar by 25%,by how much percent must a householder decrease the consumption of sugar so that there is no increase in the expenditure on sugar?
asked on August 21, 2016 
Maths Algebra
In a hostel,50 kilogram milk are consumed everyday.If each student gets 400 gram of milk per day,find the number of students who take drinks in the hostel.
asked on August 19, 2016 
Maths Squares and Square roots
How to find the sum, without adding? (1)(2+4+6+8+10) (2)(1+3+5+7+9+11+13) (3)(2+4+6+8+10+12+14+16+18+20)
asked on August 19, 2016 
Maths Triangles
Prove that the sum of the angles of Triangle is 180°.
asked on August 19, 2016 
science
What is in orange, but not in banana, cherry has it, but not in apple?
asked on December 8, 2015 
geography
geography envoirment
asked on March 4, 2011 
Math
metrix method solve equation 2xy3z=9 ,x+y+z=6 ,xy+z=2
asked on July 19, 2018 
Physics
A man pulls a bucket of water of mass 10kg from a well 5meter deep in 5 sec. Calculate the power of the man.
asked on December 18, 2017 
math
Find five rational numbers between  3/5 and  1/2
asked on November 30, 2016 
Maths Percentage
(1)Emraan income is 25% more than that of Syed. How many per cent is Syed's income less than that of Emraan? (2)Ram's income is 20% more than that of Lakshman. How many percent is Lakshman's income less than that of Ram? (3)Hero's income is 20% less than
asked on September 13, 2016 
Maths Percentage
Syed's income is 25% more than that of Emraan.How many per cent is Emraan's income less than that of Syed?
asked on September 12, 2016 
Maths Graph
Q1(a)How to draw the graph of the function A=x^2. Q1(b)From the graph, How to find the value of A,when (i)x=2 (ii) x=3 (iii)x=4
asked on September 7, 2016 
Maths Mensuration
An ox in a oil processing apparatus is tethered to a rope 3m long .How much distance does it cover in 14 rounds?
asked on August 21, 2016 
Maths Percentage
A period of 4 hours and 30 minutes is what per cent of a day?
asked on August 19, 2016 
Maths Algebra
Ravi owns a plot of rectangular shape.He has fenced it with a wire of length 750 m.The length of the plot exceeds the breadth by 5 m. Find the length and breadth of the plot.
asked on August 19, 2016 
Math
given f(x)= 5x+4/5x^2+4x and g(x) = 1/x simplify f(x) and find any vertical asymptotes
asked on August 19, 2016 
Maths Algebra
Solve and check the result.3(5x7)2(9x11)=4(8x13)17
asked on August 19, 2016 
Maths Quadrilaterals
Prove that the sum of the angles of Quadrilateral is 360°.
asked on August 19, 2016 
Maths Time and Work
The rates of working of A and B are in the ratio 3:4.Find the number of days taken by them to finish the work?
asked on August 19, 2016 
Maths Unitary Method
If 5 men or 7 women can earn Rs 875 per day.how much would 10 men and 5 women earn per day?
asked on August 19, 2016 
Maths Algebra
Mass of Earth is (5.97×10^24)kg and Mass of Moon is (7.35×10^22)kg.What is the Total mass of the two?
asked on August 19, 2016 
Physic
What is comet how it fall
asked on February 25, 2012 
Physics
What is energy
asked on February 24, 2012 
physics
The earth's atmosphere extends to a height of nearby 200KM above its surface there many be explosion and noises taking place in the outer space but we do not hear them.why?
asked on January 3, 2012 
math
what is the perimeter value of r=a(1+cos theta)
asked on March 28, 2011

physics
4 ohm
posted on June 10, 2018 
Physics
Here,m=10kg h=5meter t=5sec g=10m/s and,since P=(m×g×h)÷t (10×10×10)÷5 =100
posted on December 18, 2017 
math
4/5
posted on May 28, 2017 
trig
75/2
posted on February 20, 2017 
Maths Congruence
This is a right triangle.
posted on September 21, 2016 
math
Decimal form of 5/8 = 0.625 Decimal form of 4 5/8 = 0.625+4 =4.625 HENCE DECIMAL FORM OF 4 5/8 is 4.625.
posted on August 19, 2016 
Maths Mensuration
Let the inner and outer radii of the circular track be R metres and m metres respectively.Then,Inner circumference=220 metre (Use pi= 22/7) 2piR=220 2×22/7×R=220 R=35 m Since the track is 7 metre wide everywhere. m=Outer radii = R+7 = (35+7)m=42 m Outer
posted on August 19, 2016 
maths
A=D1*D2 LIKE D=24 AND 18. SO 24*18=432. THEREFORE AREA=432 . AND SIDE= SQRT D1*2+D2*2 . SO GIVEN D1 AND D2 =24 AND 18 =SQRT 24^2 +18^2= 576+324 =900 THEREFORE SIDE= sqrt900=30.
posted on September 21, 2014 
maths
30 90 115
posted on July 16, 2013 
physics
Assume g= 10 m/sec2 60*x1 + 35*x2 = 1.3*10=13 on observation we get x1= 0.1 m x2= 0.2 m so tan(angle)= .1/.8= .125 angle= 7.125 degree
posted on December 14, 2012 
Physics
Wgat is energy
posted on February 20, 2012 
physics
The capacity do to work
posted on January 3, 2012 
physics
300 cos 35.2  Fk = ma fk = 300 cos 35.2  ma Fn = mg + 400 sintheta = 300 + 400 sin 35.2 Fk = Fn*uk uk = 0.57 300 cos 35.2  ma = 0.57 [ 300 + 400sin 35.2] ma = (0.57)[300+400sin35.2] [300 cos 35.2] a = all that crap on the right side/ (300N/0.9) a =
posted on October 23, 2011 
Math
b. 525 is the population of the frogs after 5 years
posted on March 28, 2011 
math
44 degree
posted on March 28, 2011 
math
we have problem it'sa regular quadilateral example given by u is not correct
posted on November 8, 2009