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if the surface area of a sphere is 1256cm^2 if the diameter of the sphere is decreased by 5cm what is the surface area of the new sphere????? using pie=3.14

Mathematics
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what was the original diameter?
doesnt give one :(
The original radius was 10 cm, calculated from A=4 times pi times r squared. r squared is 100. If you reduce the radius to half, you'll reduce the surface area to one quarter.

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oh my goodness thanks so much :D

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