Question

whole surface area of a solid hemisphere is equal to the curved surface area of the solid sphere. Let us write the ratio of lengths of radius of hemisphere and sphere?​

Answer 1

Step-by-step explanation:

Let the radius of the solid hemisphere be r1 unit and radius of the solid sphere be r2 unit. As per question, 3πr31=4πr22⇒r21r22=43⇒(rr2)2=(2√3)=2:√3. Hence the required ratio=2:√3.

Answer 2

Step-by-step explanation:

let the radius of hemisphere be R

let the radius of sphere be r

now it is given

total surface area of hemisphere = CSA of sphere

3πR²=4πr²

R/r = 2/√3