A towel, when bleached, was found to have lost 20% of its length and 10% of its breadth. The percentage of decrease in area is
Pick one.
A) 28%	B) 30%	C) 32%	D) 38%	E) 40%
Let original length = x and original breadth = y.   Decrease in area   = xy - 80 x x 90 y   100 100   = xy - 18 xy   25   = 7 xy.   25   Decrease % = 7 xy x 1 x 100 % = 28%.   25 xy   28%)
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A towel, when bleached, was found to have lost 20% of its length and 10% of its breadth. The percentage of decrease in area is