Question

The radil of two cylinders are in the ratio 21 3 and their heights are in the ratio
5.3. Calculate the ratio of their curved surface areas​

Answer 1

Answer:

10/9

Step-by-step explanation:

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

I hope it helps you