Question
The radii of two cylinders are in the ratio 3: 5 and their heights are
in the ratio of 2 : 3. Find the ratio of their curved surface areas.
The radii of two cylinders are in the ratio 3: 5 and their heights are
in the ratio of 2 : 3. Find the ratio of their curved surface areas.
Answer: Option C
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Let the radii of the cylinders be 3x, 5x and their heights be 2y, 3y respectively.
Ratio of their curved surface area = (2 X 22/7 X 3x X 2y)/(2 X 22/7 X 5x X 3y) = 2/5 = 2:5
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