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A hemispherical bowl is made of steel of thickness $0.30$ cm. The inner radius of the bowl is $3$ cm. The volume of steel used (in cu cm) is :
- (a)$595.8 \pi$
- (b)$5.958 \pi$
- (c)$6 \pi$
- (d)$59.58 \pi$
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Sol. (B) $5.958 \pi$