The radii of two cylinders are in the ratio 3 : 5. If their heights are in the ratio 2 : 3, then the ratio of their curved surface areas is

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Given that r_1 : r_2 = 3: 5 and h_1 : h_2 = 2 : 3 Then, The ratio of C.S.A. of cylinders `s_1 /s_2 = (2pir_1h_1) / (2pir_2h_2) s_1/s_2 = (r_1/r_2) xx (h_1/h_2) = $\frac{3}{5}$ xx $\frac{2}{3}$ s_1 /s_2 = $\frac{2}{3}$ s_1 :s_2 = 2:5`

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