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Arvind Sundaram asked a question
Subject: Maths, asked on on 25/1/13

Q15.

Use the following information to answer the next question.

The capacity of a tub, which is of the shape of the frustum of a cone, is 16720000 cm3. The respective radii of the upper and lower bases of the tub are 90 cm and 40 cm.

What is the slant height of the tub?

A :

60 cm

B :

70 cm

C :

120 cm

D :

130 cm

The volume of the frustum of a cone is given by.

∴ Volume of the tub

Slant height (l) of the frustum of cone =

Thus, the slant height of the tub is 130 cm.

The correct answer is D.








ERROR - The volume should be 1672000 and not 16720000, there is an extra zero in the question.

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