A large cube is formed from the material obtained by melting three smaller cubes

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Question

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?

Options:

A . 2 : 1

B . 3 : 2

C . 25 : 18

D . 27 : 20

Answer: Option C
Answer: (c).25 : 18

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