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: Option D
- Let original length = a and original breadth = b.
Decrease in area = ab - 80 a x 90 b 100 100 = ab - 18 ab 25 = 7 ab. 25
Decrease % = 7 ab x 1 x 100 % = 28%. 25 ab
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- Let original length = a and original breadth = b.
Decrease in area = ab - 80 a x 90 b 100 100 = ab - 18 ab 25 = 7 ab. 25
Decrease % = 7 ab x 1 x 100 % = 28%. 25 ab
Was this answer helpful ?
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