Management Aptitude Test Sep 2011 Paper

Question : 87 of 200

Marks: +1, -0

A wire of length 22 cm and 0.2 cm in diameter is melted and recast into small balls of diameter 0.1 cm. The number of balls made is

Solution:

(3) Let the number of balls be n. Then, volume of wire= n x volume of ball
⇒ π x

0.2/2×0.2/2

x 22 = n x

4/3×π×0.1/2×0.1/2×0.1/2

⇒ n =

{22×3×2×2×2×10}/4

⇒ n = 1320

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