Lessons

General Aptitude
8.1 Volume and Surface Area - General Questions

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Q.

A large cube is formed from the material obtained by melting three smaller cubes of 3, 4 and 5 cm side. What is the ratio of the total surface areas of the smaller cubes and the large cube?

View Answer

Correct choice: C

Explanation:

Volume of the large cube = (33 + 43 + 53) = 216 cm3.

Let the edge of the large cube be a.

So, a3 = 216     ⇒     a = 6 cm.

∴ Required ratio = (6 x (32 + 42 + 52))/ = 50/ = 25 : 18.
(6 x 62) 36
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