Question
Nine cubes with each side measuring 3 cm are aligned in
a straight row to build a cuboid. What is the total surface area of the resulting cuboid?Solution
ATQ,
Length = 9 × 3 = 27 cm
Breadth = 3 cm
Height = 3 cm
Total surface area = 2 × (27 × 3 + 3 × 3 + 3 × 27)
= 2 × (81 + 9 + 81) = 2 × 171 = 342 cm²
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