Aptitude - Area - Discussion
Discussion Forum : Area - General Questions (Q.No. 7)
7.
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
Explanation:
Let original length = x and original breadth = y.
| Decrease in area |
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 Decrease % = |
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7 | xy x | 1 | x 100 |  % |
= 28%. |
| 25 | xy |
Discussion:
28 comments Page 3 of 3.
Sam said:
9 years ago
x + y - (x * y/100).
Then, 20% + 10% - [20 * 10/100].
30% - 2% = 28%.
Then, 20% + 10% - [20 * 10/100].
30% - 2% = 28%.
Akil said:
3 years ago
It is simple.
L(0.80)*B(0.90).
= LB(0.72).
So, 100 - 72= 28% loss.
L(0.80)*B(0.90).
= LB(0.72).
So, 100 - 72= 28% loss.
(14)
Santho said:
1 decade ago
x+y-(x*y/100)
Then, 20% + 10%-[20*10/100] = 28%
Then, 20% + 10%-[20*10/100] = 28%
Sania said:
1 decade ago
But shouldn't the area of a towel be (l+b).
Nani said:
1 decade ago
Please explain clearly anyone of you.
Dhanraj said:
8 years ago
How 7/25 came there? Explain it.
Islam Ansari said:
9 years ago
xy - 18/25xy.
= 7/25xy.
How?
= 7/25xy.
How?
Jatin said:
8 years ago
-20-10+20*10/100 = 28%.
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