Q : 6 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.
Inner radius of the hemispherical tank =
Thickness of the tank =
Outer radius = Internal radius + thickness =
We know, Volume of a hemisphere =
Volume of the iron used = Outer volume - Inner volume
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