Question

The radius and slant heivht of a right circular cone are in the ratio 7:13. Its csa is 286. Find radius

Answer 1

Let the r be 7x and l be 13x

then,CSA= π

286=22/7*7x*13x

286*7/22*7*13=x²

1=x²

1=x

so the r will be 7*1=7cm

l will be 13*1=13cm