Question

# Two cubes each of volume 125 cm3 are joined end to end to form a solid. Find the surface area of the resulting cuboid.

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Solution

## Volume of each cube = 125 cm3 So, edge of each cube = 5 cm For new cuboid formed, l = 5+5 = 10 cm b = 5 cm h = 5 cm Therefore, surface area of the resulting cuboid = 2 (lb + bh + lh) = 2 (10 × 5 + 5 × 5 + 10 × 5) cm2 = 250cm2

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