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OpenStudy (anonymous):
HELP!!! HELP!!! (a) Determine the exact total surface area of a sphere with radius square root of 2 metres (I know this one the answer is 8Pi square metre) (b) An inverted cone with side length 4 metres is placed on top of the sphere so that the centre of its base is 0.5 metres above the centre of the sphere. Find the radius of the cone exactly?
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