Question

The surface area of a sphere 384400. Find the radius.

Answer 1

given surface area of the sphere = 384400cm²

formula for the surface area of a sphere is 4πr²

➡ 4πr² = 384400cm²

➡ 4 × 22/7 × r² = 384400cm²

➡ 88/7 × r² = 384400cm²

➡ r² = 384400/1 × 7/88

➡ r² = 2690800/88 = 672700/22 = 336350/11

➡ r = √(336350/11)