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The radii of two right circular cylinders are in the ratio 2:3 and ther heights are in the ratio 5:4. Calculate the ratio of their curved surface areas



So given \frac{r_1}{r_2}=\frac{2}{3}

so curved surface are = 2πrh 

So we have to find the ratio of   2πr₁h₁/2πr₂h₂ = r₁h₁/r₂h₂ = 


= 5/6

so the ratio is 5 : 6 ANSWER

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