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Volume and Surface Area

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 1800

B 1200

C 900

D 720

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.
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