SSC CGL Tier II 1 Dec 2016 Paper 1

Question : 55 of 100

Marks: +1, -0

A cylindrical pencil of diameter 1.2 cm has one of its ends sharpened into a conical shape of height 1.4 cm. The volume of the material removed is

Solution:

(1) Volume of removed material

=\π r^{2} h- {1}/{3} \π r^{2} h= {2}/{3} \π r^{2} h

= ( {2}/{3}×{22}/{7} × 0.6× 0.6× 1.4 ) {cu} . {cm}

= 1.056 cu. cm.

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