Question
Three cubes, each having a side length of 9 cm, are
connected in a straight line. Calculate the total surface area of the formed cuboid.Solution
ATQ,
Length of cuboid = 3 × 9 = 27 cm
Breadth of cuboid = 9 cm
Height of cuboid = 9 cm
Total surface area of cuboid = 2 × (lb + bh + hl)
So, required area = 2 × (27 × 9 + 9 × 9 + 9 × 27) = 2 × (243 + 81 + 243) = 1,134 cm²
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