A towel, when bleached, lost 20%20% of its length and 10%10% of its breadth. What is the percentage decrease in area?  Choices
A) 30% B) 28% C) 32% D) 26% E) 28%
Explanation:   Let original length =10   original breadth =10   Then, original area =10×10=100   Lost 20%20% of length   ⇒ New length =10−2=8 (∵ 2 is 20% of 1010)   Lost 10% of breadth   ⇒ New breadth =10−1=9 (∵ 1 is 10% of 10)   New area =8×9=72   Decrease in area   = original area - new area   =100−72=28   Percentage decrease in area   =decrease in area /original area×100   =28/100×100=28%   Answer: Option 28%
<result>B</result>
A towel, when bleached, lost 20%20% of its length and 10%10% of its breadth. What is the percentage decrease in area?