The curved surface area of a sphere is 616cm2 . then find its diameter.
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4
CSA = 4πr2
616=4πr2
r2 = 616×7/22×4
r= 28cm
D = 28×2
= 56 cm
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Surface area of a sphere is 616 cm²
4×pie×r² = 616
4(22/7)r² = 616
r² = 49
r = 7
4×pie×r² = 616
4(22/7)r² = 616
r² = 49
r = 7
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