Discuss Forum
1. A towel, when bleached, was found to have lost 20% of its length and 10% of its breath . what is the percentage of decrease in area?
- A. 10%
- B. 10%
- C. 10%
- D. 10%
Answer: Option D
Explanation:
Let, original length = x
and original breadth = y
Decrease in area = xy - ( 80x/100×90y/100) = ( xy - 18xy/25) = 7xy/25
Decrease % = ( 7xy/25 ×1/xy ×100%) = 28%
Post your comments here: