A hemispherical bowl is made of steel 0....

A hemispherical bowl is made of steel 0.5 cm thick. The inside radius of the bowl is 4cm. find volume of steel

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Volume of steel`=2/3pi(r_(outer))^3-2/3pi(r_3)^3`
`=2/3pi[(4.5)^3-(4)^3]`
`=2/3pi[(4.5-4)(20.25+18+16)]`
`=2/3*22/7*1/2*54.25cm^3`
`=56.833cm^3`.

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