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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 |
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Answer» (B) 924 cm2 h = 2r, πr2h = 2156 ⇒ r = 7 T.S.A = 2πrh + 2πr2 = 924 |
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