A hollow spherical shell is made of metal of density 4.8 g/cm3. If its internal and external radii are 10 cm and 12 cm respectively, find the weight of the shell
A
15.24 kg
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B
12.84 kg
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C
14.64 kg
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D
None of these
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Solution
The correct option is B14.64 kg Volume of spherical shell =4π3(R3−r3)=4π3(123−103) =43×π×(12−10)(122+12×10+102) =43×π×2×264cm3 Weight=volume×density=43×π×364×4.8=14.64kg