A cloth, 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) 20%  B) 25%  C) 28%  D) 30%  E) 35%
length = x   decrease = xy = 80/100 * 90/100 y   xy - 18/25 xy   =7/25 xy   dec % = 7/25*1/xy*100 = 28   ANSWER 28%
<result>C</result>
A cloth, when bleached, was found to have lost 20% of its length and 10% of its breadth. The percentage of decrease in area is: