Volume 24Q

24.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

Answer:

Option : C 

Let height be h m.

According to condition,

⇒	2 (15 + 12) x h	=	2 (15 x 12)

⇒	h	=	180	m
			27

⇒	h	=	20	m	= 6.66 m
			3

Therefore,

⇒	Volume	=	2 (15 x 12 x 6.66) m3	= 1200 m3