Question

the radii of 2 cylinders are in the ratio 2:3 and their heights are in the ratio 5:3 .
calculate the raio of their curved surface area

Answer 1

Solution:- Ratio of radii r1:r2 = 2:3 ratio of heights h1:h2 = 5:3 As we know ,Formula of curved surface area = 2 pi r h So ,Ratio of curved surface=2*pi*r1*h1 : 2*pi*r2*h2 After cancelling pi and 2 we get , =(r1*h1)/(r2*h2) =( r1/r2)* (h1/h2) =(2/3)*(5/3) = 10/9 That would be the final answer.