Volume of a hemisphere = (2/3)πr³

Given, hemispherical bowl is made of steel 0.25 cm thick. The inside radius of the bowl is 5 cm.

Outer radius = 5 + 0.25 cm = 5.25 cm

Volume of steel used in the making of the bowl

⇒ Volume of steel used in the making of the bowl = 41.28 cm³