a spmhere of maximum possibble volume is carved from cube of length 21 cm find volume of sphere

Volume of cube lcube
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Volume of cube=21^3=9261cc. Volume of a sphere is 4(pi)r^3/3=9261, where r=radius of sphere. r^3=2210.9, so r=13.03cm approx. This sphere uses the whole volume of the cube.

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