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The surface area of a football is 616 cm2, then find the radius of that ball. ( π = 22/7). |
Answer» Surface area of a football (sphere) = 4πr2 . 4πr2 = 616 πr2 = 154 r2 = 154 × \(\frac{7}{22}\) r2 = 7 × 7 = 49 ∴ r = 7 cm |
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