Question
Seven cubes, each of edge 7 cm, are attached in a row to
make a cuboid. Find its total surface area.Solution
ATQ,
Length = 5 Ă— 6 = 30 cm
Breadth = 6 cm
Height = 6 cm
Total surface area = 2 Ă— (30 Ă— 6 + 6 Ă— 6 + 6 Ă— 30)
= 2 × (180 + 36 + 180) = 2 × 396 = 792 cm²
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