Question

If internal and external radii of a hollow hemisphere are 3 cm and 4.0 cm, then the area of the ring is​

Answer 1

Answer:

~ 87.96 cm²

Explanation:

area of sphere : A=4πr²

area of ring = area of circle having radius 4 - area of circle having radius 3

area of ring = 4π(4)² - 4π(3)²

~ 201.06 - 113.1

~ 87.96 cm²