Question
If the height of a cylinder is increased five times and
radius is reduced by 40%, then what is the percentage change in its volume?Solution
ATQ, Volume of cylinder = πr²h Height = 1 : 5 Radius = 5 : 3 Ratio = 25 : 45 = 5 : 9 Change = 9 × 100 / 5 = 180% Since > 100, increase = 80%
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