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Find the surface area of a sphere of diameter : (i) 14 cm (ii) 21 cm (iii) 3.5 cm |
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Answer» Surface area of a sphere of diameter ‘d’ = πd2 (i) d is 14 cm ⇒ surface area = (22/7) × (14)2 = 616 cm2 (ii) d is 21 cm ⇒ surface area = (22/7) × (21)2 = 1386 cm2 (iii) d is 3.5 cm ⇒ surface area = (22/7) × (3.5)2 = 38.5cm2 |
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