Question

find the surface area of hemisphere of radius 21 CM​

Answer 1

Answer:

Surface Area = 4158 cm²

Step-by-step explanation:

Surface Area of Hemisphere = Total Surface Area of Hemisphere = 3πr²

TSA = $3*\frac{22}{7} * 21 *21$

TSA = 3 x 22 x 21 x 3

TSA = 4158 cm²

Answer 2

Answer:

Curved Surface area of a hemisphere =2πr²

=2×22/7 ×21×21=2772cm²

Total surface area of a hemisphere =3πr²

=3×22/7×21×21=4158cm²