The radii of two cylinders are in the ratio 2:3 and their heights are in the ratio 5:8. Calculate the ratio of their curved surface areas.
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Let the radii be 2x and 3x, let the height be 5y and 3y. so, ratio of volume =r²h/R²H =(2x)²×5y/(3x)²×3y =20x²y/27x²y =20/27, ratio of CSA =rh/RH =2x×5y/3x×3y =10xy/9xy =10/9. the value of x and y can be termed to be get highes value and therefore bring forth in taking radius calculation
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