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By Mathematics Mcqs Volumes No Comments

The edge of three cubes of metal is 3 dm, 4 dm and 5 dm. They are melted and formed into a single cube. Find the edge of the new cube?

A. 3 dm
B. 4 dm
C. 5 dm
D. 6 dm

 

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33 + 43 + 53 = a3 => a = 6

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