Mensurationmedium · Past Paper
The radii of two cylinders are in the ratio 2:3 and their heights are in the ratio 5:3. Find the ratio of their curved surface areas.
A10:9
B4:9
C20:27
D5:3
✓ Correct Answer: A — 10:9
Ratio of CSA = (2πr1h1) / (2πr2h2) = (r1/r2) * (h1/h2) = (2/3) * (5/3) = 10:9.
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