A hemispherical bowl is made of steel, 0.25cm thick. The inner radius of the bowl is
4cm. Find the volume of steel used in making the bowl.
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Answer:
Outervolume=2/3πR^3
R=4.25cm
Inner volume=2/3πr^3
r = 4cm
Innner volume = 2/3x22x4^3/7
= 134.lcm3
outervol=2/3x22x4.25^3/7=160.8
Vol. of steel used=160.8-134.1
=26.7cm3. Ans
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