Volume 11Q

11.The cost of painting the whole surface area of a cube at the rate of 13 paise per Sq.cm is Rs. 343.98. Then the volume of the cube is

     A.   8500 cm3

     B.   9000 cm3

     C.   9250 cm3

     D.   9261 cm3

Answer:

Option : D 

Surface area, 6a2	=		34398		=	2646
			13

⇒ 6a² = 2646⇒ a² = 441⇒ a = 21

So,volume = (21x21x21) cm³ = 9261 cm³.