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- A towel, when bleached, was found to have lost 20% of its length and 10% of its breadth.
Question 1:
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:
A. 10%
B. 10.08%
C. 20%
D. 28%
Feedback Let original length = x and original breadth = y.
Decrease in area= xy -(80x/100 x 90/100 y)
=xy -18/25xy
=7/25xy.
Decrease % =7/25xy x 1/xy x 100%= 28%.
Decrease in area= xy -(80x/100 x 90/100 y)
=xy -18/25xy
=7/25xy.
Decrease % =7/25xy x 1/xy x 100%= 28%.
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