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

Correct Answer: 6 m

Explanation:

The edge of the new cube is = 3 3 + 4 3 + 5 3   =   a 3  => a = 6 m.


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