Answer :

Volume of First cuboids = 5 × 6 × 7 = 210 vm3


Volume of second cuboids = 4 × 7 × 8 = 224 cm3


Volume of third cuboids = 2 × 3 × 13 = 78 cm3


Volume of cube = 210 + 224 + 78 = 512


Let side of cube = a


a3 = 512


a = 8 cm


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