Three cuboids of dimensions 5c m\ xx\ 6c...

Three cuboids of dimensions `5c m\ xx\ 6c m\ xx\ 7c m ,\ 4c m\ xx\ 7c m\ xx\ 8c m\ a n d\ 2c m\ xx\ 3c m\ xx\ 13 c m` are melted and a cube is made. Find the side of cube.

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