Question

Q14. Find the surface area of a sphere of radius 19.5cm.​

Answer 1

Given :

• Radius of circle = 19.5 cm

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To Find :

• Surface area of the sphere

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Solution :

★ Surface area of sphere = 4πr²

⇒ Area = 4 × 22/7 × 19.5 × 19.5

⇒ Area = 88/7 × 380.25

⇒ Area = 33462/7

⇒ Area = 4780.2 cm²

∴ Surface area of sphere is 4780.2 cm²