Aptitude - Question 15

+2 votes
A new cotton bedsheet, when washed, was found to have lost 10% of its breadth 
and 20% of its length. The percentage of decrease in area is:

(A) 20% 
(B) 28%
(C) 30% 
(D) 34%
asked May 10 in Aptitude by getgatebook (33,170 points)
reshown May 11 by getgatebook

1 Answer

+3 votes
Area = length * breadth

 length decreased by 20 %

length be l and breadth be b

new legth be  0.8 of l

new breadth be 0.9 of b

new area  0.8l * 0.9b = 0.72 lb

decrese in area is 28 %.
answered May 11 by tsankitjha910 (3,730 points)
Answer:
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