Question: The radius of a cylinder is 2 r units and height is 3 r units. Find the curved surface?\nOptions:\n(A) 27\n(B) 16\n(C) 12\n(D) 18\n(E) 11 Random thoughts:
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2 * π * 2r * 3r = 12 πr2 The final answer: (C).
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