1. If length of a rectangle is increased by 10% and breadth is increased by 15%, then what will be the percentage increase in the area of rectangle?
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By: anil on 05 May 2019 02.27 am
Let the length and breadth of the rectangle be $$10$$ cm Area of rectangle = $$10 imes10=100$$ $$cm^2$$ After increasing the length by 10%, => New length = $$10+(frac{10}{100} imes10)$$ = $$10+1=11$$ cm Similarly, new breadth = $$10+(frac{15}{100} imes10)$$ = $$10+1.5=11.5$$ cm => New area = $$11 imes11.5=126.5$$ $$cm^2$$ $$ herefore$$ Increase in area = $$frac{(126.5-100)}{100} imes100=26.5\%$$ => Ans - (D)
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