Question
Eight identical cubes of edge 4 cm are joined end to end.
Calculate the total surface area of the solid formed.Solution
ATQ,
Length = 8 × 4 = 32 cm
Breadth = 4 cm
Height = 4 cm
Total surface area = 2 × (32 × 4 + 4 × 4 + 4 × 32)
= 2 × (128 + 16 + 128) = 2 × 272 = 544 cm²
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