SOLUTION: if the total surface area of a solid hemisphere is 460 cm square.find its volume

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Question 850179: if the total surface area of a solid hemisphere is 460 cm square.find its volume
Answer by Alan3354(69443) About Me  (Show Source):
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if the total surface area of a solid hemisphere is 460 cm square.find its volume
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SA for a sphere is 4pi*r^2
The SA for the round part of a hemisphere = 2pi*r^2
The flat part is pi*r^2
--> 3pi*r^2 = 460
r+=+sqrt%28460%2F3pi%29
r =~ 6.98624 cm
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Vol+=+2pi%2Ar%5E3%2F3
= 714.1487 cc