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

Explanation

Internal Radius of bowl, `r=4cm`

Thickness, `t`=`0.5cm`

External radius, `R=r+t`

`R=4+0.5=4.5cm`

Volume of steel used in making the hemispherical bowl = volume of the shell

`therefore` Volume, `V=2/3pi(R^3-r^3)`

`V=2/3xx22/7xx(4.5^3-4^3)`

`V=56.83cm^3`

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