Mensuration Practice Test 1

Question : 10 of 40

Marks: +1, -0

A right circular metal cone (solid) is 8 cm high and its radius is 2 cm. It is melted and recast into a sphere. What is the radius of the sphere?

Solution:

Volume of the right circular cone =

1/3 πr^2h

1/3 π 4.8

{32}/3 π

Volume of the sphere =Volume of the sphere =

4/3 πr^2

4/3 πr^3

{32}/3π

r^3

= 8
r = 2 cm

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