Question

Find the volume of a sphere whose surface area is 154 cm².​

Answer 1

Answer:

surface area of sphere = 4πr² = 154cm²

→ 4 × 22/7r² = 154cm²

→r² = 154/4 × 7/22

→ r²= 49/4

→ r = √49/4

•°• r = 7/2 = 3.5

Volume of the sphere = 4/3πr²

= 4/3 × 22/7 × 3.5

= 88/21 × 42.875

= 179.67 cm³ ans.