Volumes Practice Test 4

Question : 14 of 16

Marks: +1, -0

A hollow spherical metallic ball has an external diameter 6 cm and is

1/2

cm thick. Find the volume of the metal used in the ball.

Solution:

Volume of the metal used in the ball =

4/3 π [(3)^3-(3-1/2)^3]

4/3 × {22}/7 [27-{125}/8]

4/3 × {22}/7 × {91}/8

{143}/3

47 2/3 cm^3

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