The side of a square is increased by 35% find the percentage gain in area
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a variable X changes by A% and another variable Y changes by B%, then overall net change when the two variables are multiplied is given by :
A + B + AB/100
If the change is “increase” it is positive & if the change is “decrease” it is negative.
so for increasing 50% in side so
according to above concept
What will be increase in area of a circle if radius is increased by 50% ?
Ans : 50 + 50 + (50 x 50)/100 = 125%
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