Question
The length is increased by 25%, breadth remains
unchanged, and the height is reduced by 20%. Find the net percentage change in volume.Solution
ATQ, Let initial dimensions be l, b, h. Initial volume = lbh cubic units New volume = 1.25l × 1b × 0.8h = 1.0lbh Required percentage change = {(1.0lbh – lbh)/lbh} × 100 = 0% (No change)
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