Question

if radius of a sphere is 7 cm then find it's surface area?​

Answer 1

First, Let me tell you formulae of surface area of sphere i.e, 4πr²

Now r = 7cm

Hence S.A of sphere = 4πr² = 4 * 22/7 * 7 * 7

= 616cm²

Answer 2

radius = 7cm

surface area of sphere = 4πr²

4×22/7 × 7×7

4 × 22/7 × 49

4×22×7

616 cm²

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