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      Question

      The length is increased by 25%, breadth remains

      unchanged, and the height is reduced by 20%. Find the net percentage change in volume.
      A 55.62% Correct Answer Incorrect Answer
      B 24.22% Correct Answer Incorrect Answer
      C 8.24% Correct Answer Incorrect Answer
      D No change Correct Answer Incorrect Answer

      Solution

      ATQ, Let initial dimensions be l, b, h. Initial volume = lbh cubic units New volume = 1.25l Γ— 1b Γ— 0.8h = 1.0lbh Required percentage change = {(1.0lbh – lbh)/lbh} Γ— 100 = 0% (No change)

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