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.
Udhaya Kumar said:
1 decade ago
Which of the following multipliers will cause a number to be increased by 29.7%?
Answer is 1.297.
Please anybody solve this and clear me this problem.
Answer is 1.297.
Please anybody solve this and clear me this problem.
Akhil Nair said:
1 decade ago
@Udhaya Kumar:
Let's say that the number is 100.
Now increase in 29.7 % means.
100+29.7%100 = (100+29.7) = 129.7-----> (1).
Now the multiplier is 1.297. So multiply it to the assumed number i.e.
100*1.297=129.7-----> (2).
So from (1) & (2) the number increased by 29.7%.
Hope this helped.
Have a nice test !
Let's say that the number is 100.
Now increase in 29.7 % means.
100+29.7%100 = (100+29.7) = 129.7-----> (1).
Now the multiplier is 1.297. So multiply it to the assumed number i.e.
100*1.297=129.7-----> (2).
So from (1) & (2) the number increased by 29.7%.
Hope this helped.
Have a nice test !
Ravi said:
1 decade ago
Population of town is increased by 5% annually. If its population in 2001 was 138915. What it was in 1998? reply soon.
Sunil said:
1 decade ago
1,20,000 is the right answer.
138915 = X(1+5/100)^(10).
Calculate X = 1,20,000.
138915 = X(1+5/100)^(10).
Calculate X = 1,20,000.
Mahi said:
1 decade ago
Why we use 10 here?
Sunil vishwakarma said:
1 decade ago
10 is because there is formula of 2 years, p(1+r/100)^t, where t is for next 2 year, is 2*5 = 10.
Yatender said:
1 decade ago
Most of them are wrong because firstly we use our original salary then 20%of that salary=remaining and 60% of that remaining and so on. @Aparna is right.
Dinesh said:
1 decade ago
Dear @Manisha you can solve that problem very simply.
Add all the expenses so 20+60+10 = 90.
Out of 100% 90% spending on his expenses so 100-90 = 10.
Let the salary be x.
10% of x = 30.
10/100*x = 30 we get.
1/10*x = 30.
So x = 300.
Add all the expenses so 20+60+10 = 90.
Out of 100% 90% spending on his expenses so 100-90 = 10.
Let the salary be x.
10% of x = 30.
10/100*x = 30 we get.
1/10*x = 30.
So x = 300.
Aparna said:
1 decade ago
How 50/10 came in the last step. Can anyone help me to understand?
Anil said:
1 decade ago
Two numbers are respectively 25% and 20% more than of third. What percentage is the first of second. Could you solve this problem any one?
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