Aptitude - Simple Interest - Discussion
Discussion Forum : Simple Interest - General Questions (Q.No. 6)
6.
A sum of Rs. 12,500 amounts to Rs. 15,500 in 4 years at the rate of simple interest. What is the rate of interest?
Answer: Option
Explanation:
S.I. = Rs. (15500 - 12500) = Rs. 3000.
| Rate = |  |
100 x 3000 |  % |
= 6% |
| 12500 x 4 |
Video Explanation: https://youtu.be/SIcQu1HOmOk
Discussion:
51 comments Page 3 of 6.
Kshiroda said:
8 years ago
To get simple interest we have to multiply principal *rate*time/100.
SammaniS said:
8 years ago
I don't understand. Why we didn't divide 3,000 by 4 (as it is given that the principal increased in 4 years) to get the actual S.I, that is for a single year?
Priya said:
8 years ago
Why we are taking as 12, 500 instead of 15,000. We are taking the number of the year (t) is 4. So we want tot take 15,500 am I right?
Dineshpalani said:
7 years ago
Please explain this problem.
Joy Kenny said:
7 years ago
The formula to calculate simple interest is P x R x T / 100.
So, Interest here is 15,500 - 12,500 = 3000.
The principal is 12,500,
Time is 4 years.
Now to calculate the rate of interest use this formula,
3000 = 12500 x r x 4 / 100,
300000 = 50000r,
r = 300000/50000,
r = 6 %.
So, Interest here is 15,500 - 12,500 = 3000.
The principal is 12,500,
Time is 4 years.
Now to calculate the rate of interest use this formula,
3000 = 12500 x r x 4 / 100,
300000 = 50000r,
r = 300000/50000,
r = 6 %.
Madhi said:
7 years ago
How we are taking time =4yrs?
Rajesh said:
1 decade ago
We have a 12500 amount & after 4 year, we get 15500 amount so total.
Profit amount or S.I in 4 Year is 3000.
Now use the Formula:.
S.I = (P*R*T) /100.
Profit amount or S.I in 4 Year is 3000.
Now use the Formula:.
S.I = (P*R*T) /100.
Priyanka said:
1 decade ago
@answer me
To get amount of S.I. for four years..
To get amount of S.I. for four years..
Juhi said:
1 decade ago
Amount = principal + simple interest.
Dats why we subtracted amount and principal to have the simple interest.
Dats why we subtracted amount and principal to have the simple interest.
Yeswanth said:
1 decade ago
Still I deosn't understand why we have to consider SI as sub 1550 from12500.
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