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Question

The mass of steel sphere having density 7850kgm3 and radius 0.15m is:

A
112kg.
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B
290kg.
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C
110.9kg.
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D
300kg.
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Solution

The correct option is C 110.9kg.
Mass of the sphere, M=Density×Volume

Volume of the sphere is, V=43πr3

V=43π(0.15)3=0.01412 m3

M=7850×0.01412

=110.9kg

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