Question

Find the ratio of total surface area of sphere and a solid hemisphere of same ratius

Answer 1

hope it will help........

Answer 2

TSA of sphere ( S1)= 4 π r ^2
TSA of hemisphere (S2) = 3π r^ 2

Ratio = S1/S2 = 4 π r^2 / 3 π r ^2 = 4/3 = 4:3