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:
[A].10%
10.08%
20%
28%
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].
[B].
[C].
[D].
Answer: Option D
Explanation:
Let original length = x and original breadth = y.
| Decrease in area |
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| Decrease % = | 7 | xy x | 1 | x 100 | % | = 28%. | |
| 25 | xy |