Question

three metallic cubes of side 3,4,5 respectively are melted and are recast into a single cube.find the total surface area of the new cube

Answer 1

volume of new cube = (3*3*3)+(4*4*4)+(5*5*5)
= 9+64+125
= 216cm3
i.e (edge)^3 = 216cm3
so, single cube= 6cm

Answer 2

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