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प्रश्न
The diameter of a sphere is 6 cm, Find the total surface area of the sphere. (π = 3.14)
योग
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उत्तर
Diameter of sphere = d = 6 cm
Radius = r = d/2 = 6/2 = 3 cm
the total surface area of sphere = 4πr2
= 4×3.14×32
= 4×3.14×9
= 36×3.14
= 113.04 cm2
Therefore the total surface area of sphere = 113.04 cm2
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