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Question

The dimensions of a metallic cuboid are 100 cm × 40 cm × 54 cm. It is melted and recast into a cube. Find the surface area of cube.

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Solution

Volume of the metallic cuboid
=100 × 40 × 54 cm3
=216000 cm3
Since the metallic cuboid is melted and is recast into a cube, the volume of the metallic = volume of the cube. Let the length of each edge of the recast cube be a cm, then,
Volume of the cube = Volume of the cuboid
a3=216000
a3=63×103
a=6×10=60cm

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