Aptitude - Percentage - Discussion
Discussion Forum : Percentage - General Questions (Q.No. 15)
15.
The population of a town increased from 1,75,000 to 2,62,500 in a decade. The average percent increase of population per year is:
Answer: Option
Explanation:
Increase in 10 years = (262500 - 175000) = 87500.
| Increase% = |  |
87500 | x 100 |  % = 50%. |
| 175000 |
 Required average = |
|
50 | % = 5%. |
| 10 |
Discussion:
93 comments Page 3 of 10.
Kishan Kumar Swain said:
6 years ago
@manish - the easiest way is...
Total expenses %age is 20%+60%+10%=90% .. so remaining is 10% ..
That remaining 10% is Rs 30 ,so
100% will be (30/10)*100= Rs 300 .. simple.
Total expenses %age is 20%+60%+10%=90% .. so remaining is 10% ..
That remaining 10% is Rs 30 ,so
100% will be (30/10)*100= Rs 300 .. simple.
Riad said:
6 years ago
Suppose,
Salary = x.
(100-90)% of x = 30.
10/100 * x = 30.
x = 30*100/10.
x = 300.
Salary = x.
(100-90)% of x = 30.
10/100 * x = 30.
x = 30*100/10.
x = 300.
Ravi Kumar said:
6 years ago
Hello @Manish.
Total will be 100%
20% for rent.
60%for expenses.
10% for LIC.
TOTAL 90% OVER.
Know remaining spend 30.
10%=30 then 100%=300 total salary.
Total will be 100%
20% for rent.
60%for expenses.
10% for LIC.
TOTAL 90% OVER.
Know remaining spend 30.
10%=30 then 100%=300 total salary.
Prince said:
6 years ago
But using the formula we get the answer is 4.137.
Sanjana said:
6 years ago
@Bunny.
Here,
1 decade = 10 years
Therefore, to find out the increased average percentage for( per year) would be always divided by 10. That's why 50 which is increased Percentage is then divided by 10 to find out the increased average percentage for PER YEAR!
Here,
1 decade = 10 years
Therefore, to find out the increased average percentage for( per year) would be always divided by 10. That's why 50 which is increased Percentage is then divided by 10 to find out the increased average percentage for PER YEAR!
Bunny said:
6 years ago
Why you take (50/10)%?
Shakil said:
6 years ago
It's like compound interest. Here, Every year more people are coming into existent. so we need to count interest rate on increased capital. Formula for compound interest is:
Increased capital = initial capital(1+rate)^year.
Increased capital = initial capital(1+rate)^year.
Ajit Raj said:
6 years ago
@Manisha.
Take total salary = 100%.
100% - 20% - 60% - 10%,
= 10%.
According to the question:
10%= 30, then,
100%=x,
By cross multiplication, we got x= 300.
Which was his total salary.
Take total salary = 100%.
100% - 20% - 60% - 10%,
= 10%.
According to the question:
10%= 30, then,
100%=x,
By cross multiplication, we got x= 300.
Which was his total salary.
Ganeshvictory said:
6 years ago
1 decade = 10 years.
Population increased as 175000 to 262000 in decade;
x = (262000-175000) = 87500.
increase percentage =(x/175000*100) = 50%.
The required average of decade from increased percentage = [increased percentage / decade] = (50/10)% = 5%.
Population increased as 175000 to 262000 in decade;
x = (262000-175000) = 87500.
increase percentage =(x/175000*100) = 50%.
The required average of decade from increased percentage = [increased percentage / decade] = (50/10)% = 5%.
Rekha said:
7 years ago
But there was not mentioned exactly 10 years. Can you please explain how it came?
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