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      Question

      Six cubes each of side 5 cm are attached end to end to form

      a cuboid. Find the total surface area of the cuboid.
      A 650 cm² Correct Answer Incorrect Answer
      B 400 cm² Correct Answer Incorrect Answer
      C 750 cm² Correct Answer Incorrect Answer
      D 815 cm² Correct Answer Incorrect Answer

      Solution

      ATQ,

      Length of cuboid = 6 × 5 = 30 cm

      Breadth of cuboid = 5 cm

      Height of cuboid = 5 cm

      Total surface area of cuboid = 2 × (lb + bh + hl), where 'l', 'b' and 'h' are

      length, breadth and height respectively

      So, required area = 2 × (30 × 5 + 5 × 5 + 5 × 30)

      = 2 × (150 + 25 + 150)

      = 2 × 325

      = 650 cm²

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