Question

16. The T.S.A of a solid hemispher
radius 21 mm.​

Answer 1

Answer:

T.S.A=2.772×10^-3 m²

Explanation:

The formula for finding the T.S.A of a solid hemisphere is

A= 2πr²

r=21 mm=21×10^-3m

A= 2×22/7×(21×10^-3)²

A= 2×22/7×21×21×10^-6

A= 2×22×3×21×10^-6

A= 2772×10^-6

A= 2.772×10^-3 m²

Hope this helps you..