RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 21. Surface Area and Volume of a Sphere

Subject: Mathematics - Class 9th

Q. No. 4 of Exercise 21.2

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4

A hemispherical bowl is made of steel 0.25 cm thick. The inside radius of the bowl is 5 cm. Find the volume of steel used in making the bowl.

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


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