Question

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?

Answer 1

let the actual length of the twoel be 20 cm length and 10 cm breadth therfore the area = l*b = 200cms

after bleach length= 16, breadth= 9

new area is 144 cm

percentage decrease = 56/ 200*100=28 %