had the diameter of asphere been decreased by 2 cm .it's surface area would have diminished by 113.04 cm. find the surface area of the sphere
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Step-by-step explanation:
The radius then decreases by 1 cm
4πR2 - 4π(R - 1)2 = 113.04
R2 - R2 + 2R - 1 = 113.04/(4π) = 8.9954
2R - 1 = 8.9954
R = (1+8.9954)/2 = 4.9977
The original surface area was
4πR2 = 4π(4.9977) cm2 = 62.803 cm2
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