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Question 55
If all the sides of a square are increased by 20%, then the area is increased by ............
Solution
Let the original length of square be x,
The sides of a square are increased by 20% = 1.2x
%tage increase in area $$\frac{1.2x^2-x^2}{x^2}\times 100 = 44\%$$
Option B is correct.
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