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Anil 09 Apr 2015 11:29 PM
1) A water tank is hemispherical below and cylindrical at the top. If the radius is 12m and capacity is 3312*pi cubic metre the height of the cylindrical portion in metres is:

2) If three metallic spheres of radii 6 cms, 8 cms and 10 cms are melted to from a single sphere, the diameter of the new sphere will be:

3) Sixty men can build a wall in 40 days, but though they begin the work together, 5 men quit every ten days. The time needed to build the wall is:

4) Shyam is travelling on his cycle and has calculated to reach point 'A' at 2 PM If he travels at 10 kmph. he will reach there at 12 noon if he travels at 15 kmph. At what speed must he travel to reach point 'A' at 1 PM:

5) An aeroplane travelling at 700 km. p. h. in level flight drops a bomb from a height of 1000 metres on a target. The time taken from releasing the bomb to hitting the target is nearest to the figure:

6) In a History examination, the average for the entire class was 80 marks. If 10% of the students scored 95 marks and 20% scored 90 marks. What was the average marks of the remaining students of the class
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Pinky Rambo 25 Apr 2015 1:28 AM
6) let no. of students =100

total marks of all students = 80 *100 = 8000 no. of students

10% students scored= 95 marks
total marks of 10% students = 95 * (10/100*100) = 950


total marks of 20% students = 90*20 = 1800

marks of remaining students = 8000-1800-950 = 5250 which are the total marks of remaining students

remaining students = 70

Av. of remaining= 5250/70
= 75 ANS.

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richard 08 Apr 2015 4:17 AM
equilateral triangle is increasing at a rate of √3 cm/min. find the rate at which its area increasing when its edge is 12 cm long.
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Dev 08 Apr 2015 4:29 AM
Assuming that the question says each side of equilateral triangle is increasing at a rate of √3 cm/min

area of an equilateral triangle, A = √3a^2/4 where a is the length of a side
Area as a function of x, A(x) = √3a^2/4
A'(x) = √3a/2

when a=12, A'(x) = √3 * 12/2 = 6√3
Required rate = 6√3 cm2/min
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Anil 07 Apr 2015 2:28 PM
The height of a room is 5m and capacity is 500cu.m. if the room is square how much paper of two metre width is required to cover the walls?
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shemurr 01 May 2015 4:01 PM
10? i guess
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Dev 09 Apr 2015 5:45 AM
question is not clear. What is the length of the paper piece mentioned to cover the walls?
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dinesh 03 Apr 2015 2:25 AM
you can use these numbers 1,3,5,7,9,11,13,15

? +?+ ?+ +?+ ?=30

you can repeat the number many times
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jeevitha 20 Apr 2015 7:11 PM
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Tripti Garg 17 Apr 2015 3:17 PM
The answer is :
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