Aptitude - Simple Interest - Discussion

Discussion Forum : Simple Interest - General Questions (Q.No. 3)
3.
A sum fetched a total simple interest of Rs. 4016.25 at the rate of 9 p.c.p.a. in 5 years. What is the sum?
Rs. 4462.50
Rs. 8032.50
Rs. 8900
Rs. 8925
None of these
Answer: Option
Explanation:
Principal
= Rs. 100 x 4016.25
9 x 5
= Rs. 401625
45
= Rs. 8925.
Discussion:
61 comments Page 5 of 7.

Shridhar said:   1 decade ago
2/3 years.

For 12 months 1 year.
For 8 months?

8/12.

Mohd dil said:   1 decade ago
Please tell me detail.

Lahari said:   1 decade ago
How to represent the time? For eg: If 2 years and 8 months like that given.

Thies said:   1 decade ago
What about the interest on interest?

Chinna said:   1 decade ago
It is very simple.

Just multiply rate of interest and time.

i.e, 9x5 = 45%.

Here 45% = 4016.25 then.

100% = ?

Hence 100% = 401625/45 = 8925.

Thank you.

Bhavna said:   1 decade ago
@Fortune.

We know that P = S.I*100/R*T.

Given S.I = 4016.25, R = 9, T = 5.

Substitute these values in above formula,

Then,

P = 4016.25*100/9*5.

P = 4016.25*20/9 (Cancel 100 with 5).

P = 80325/9.

By simplifying this we get.

P = Rs.8925.

Hope it is understandable.

Vipin Mishra said:   1 decade ago
First take a LCM of 401625 Then you can calculation easily.

Fortune said:   1 decade ago
Hey I am not able to divide 401625/45 it is easy with calculate but manually I'm not able please help me and make it easy for me step by step.

Kruba karan said:   1 decade ago
What is another way to solve this problem?

Mudassir pasha said:   1 decade ago
We can solve this problem logically also without using SI formula.

Here the the total interest amt given for 5 years is 4016.25.

Therefore for the total interest for 1 year is 4016.25/5 = 803.25.

Therefore 803.25 is the 9% of the total sum.

If we calculate the 100% of the 803.25 we will get the the total amt.

To calculate 100%, multiple 803.25 by 100 and divide it by 9.

803.25*100/9 = 8925.


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