Q. 14.7( 27 Votes )
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Answer :
Surface area of a shere = 4πr2, where r is radius
(i) r is 10.5 cm
⇒ surface area = 4 × (22/7) × (10.5)2 = 1386 cm2
(ii) r is 5.6 cm
⇒ surface area = 4 × (22/7) × 5.62 = 394.24 cm2
(iii) r is 14 cm
⇒ surface area = 4 × (22/7) × 142 = 2464 cm2
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