Volume and Surface Area - General Aptitude

Q1:

A hall is 15 m long and 12 m broad. If the sum of the areas of the floor and the ceiling is equal to the sum of the areas of four walls, the volume of the hall is:

A 720

B 900

C 1200

D 1800

ANS:C - 1200

2(15 + 12) x h = 2(15 x 12)

 h = 180 m = 20 m.
27 3
 Volume = 15 x 12 x 20 m3 = 1200 m3.
3