A hemispherical tank is made up of an iron sheet 1 cm thick. If the inner radius is 1 m, then find the volume of the iron used to make the tank

Explanation

Inner radius `r1=1m`
Thickness `=1cm=0.01m`
Outer radius `=1+0.01=1.01m=r
0`
Volume of iron used`=2/3pi(r1^2-r0^2)`
`=>2/3xx22/7xx(1.01)^3-1^3=.0643cm^3`
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