1.

The ratio of radius of base to the height of a right circular cylinder is 1 : 2. If its volume is 2156 cm3 , then its total surface area is----- (A) 1024 cm2 (B) 924 cm2 (C) 874 cm2 (D) 1204 cm2

Answer»

(B) 924 cm2

h = 2r,

πr2h = 2156

⇒ r = 7

T.S.A = 2πrh + 2πr= 924



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