If the length and the width of a garage floor were each increased by 30%, what would be the percent increase in the area of the garage floor?
Solution
Correct Answer: Option E
suppose, length = x width=y so, area = XY as, length and width both increased 30% so, current length= x+.3x=1.3x so,current width =y+.3y=1.3y current area= (1.3x X 1.3Y) =1.69xy so, percent increased= (1.69xy-xy)/xy X 100% =69%
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