Question

if the csa of hollow hemisphere is 2772 sq cm then find its tsa

Answer 1

Here is your answer. Hope it helps!

Answer 2

Answer:

CSA = 2πrsq

CSA = 2772 sq cm

2772 = 2×22/7×r sq

2772×7 ÷ 2×22 = r sq

441 = r sq

441 is the sq of 21, so

r sq = 441

r = 21

Now TSA of hemisphere = 3πrsq

= 3×22/7×21×21

= 4158 cm sq

The TSA of hemisphere is 4158 cm sq

Step-by-step explanation: