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 ?  Choose the correct choice from the following answers.
A) 25%  B) 26%  C) 27%  D) 28%  E) 29%
Explanation:   Let original length = x   and original width = y   28%ecrease in area will be   =xy−(80x/100×90y/100)   =(xy−18/25xy)=7/25xy   28%ecrease = (7xy/25xy×100)%=28   Option 28%
<result>D</result>
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 ?