Question 141

The length of a rectangular plot is increased by 25%. To keep its area unchanged, the width of the plot should be

Solution

Let length of rectangular plot be 4 m and width be 10 m

=> Area = $$lb=40$$ $$m^2$$

After length is increased by 25%, new length = $$5$$ m

=> New width if area is same = $$\frac{40}{5}=8$$ m

$$\therefore$$ Reduction in width = $$\frac{(10-8)}{10}\times100=20\%$$

=> Ans - (D)

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