Question
The length of a cuboid is increased by 20%, its breadth
is increased by 15% and its height is decreased by 10%. Find the percentage change in its volume.Solution
ATQ, Let initial dimensions be l, b, h. Initial volume = lbh cubic units New volume = 1.2l × 1.15b × 0.9h = 1.242lbh Required percentage change = {(1.242lbh – lbh)/lbh} × 100 = 24.2%
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