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Find the curved surface and total surface area of a sphere having a radius 21cm. |
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Answer» Find the curved SURFACE and total surface AREA of a sphere having a radius 21cm.Solution:⇒ Surface Area of Sphere = 4πr²⇒ Surface Area = 4 × 22/7 × (21)²⇒ Surface Area = 4 × 22/7 × 21 × 21⇒ Surface Area = 4 × 22 × 3 × 21⇒ Surface Area of Sphere = 88 × 63⇒ Surface Area of Sphere = 5544cm² |
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