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 ?

Q: 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 ?

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

15 m
4 m
6 m
9 m

Correct Answer: 6 m

Explanation:

The edge of the new cube is = $33 + 43 + 53 = a 3$ => a = 6 m.

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