Aptitude - Simple Interest - Discussion

Discussion Forum : Simple Interest - General Questions (Q.No. 1)

Simple Interest

A sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs. 854 in 4 years. The sum is:

Rs. 650

Rs. 690

Rs. 698

Rs. 700

Answer: Option

Explanation:

S.I. for 1 year = Rs. (854 - 815) = Rs. 39.

S.I. for 3 years = Rs.(39 x 3) = Rs. 117.

Principal = Rs. (815 - 117) = Rs. 698.

Discussion:

171 comments Page 9 of 18.

Ayu said: 7 years ago

I cannot understand what is simple interest? Please, someone explain me.

Imran syed said: 9 years ago

For simple interest, this formula is very helpful.

That is I = Prt.

Ravi said: 1 decade ago

If in this question asked rate also then how to solve this question?

Surjeet said: 8 years ago

Because we calculate with 3 years that is why we subtract from 815.

Lalit said: 8 years ago

Hi,

Please explain me why SI calculated on 3 years why not 4 year?

Marikkannan said: 8 years ago

Thanks for all the explanation. It is a very helpful solution.

Rohit Shekhawat said: 4 years ago

Thanks @Vikram.

You explained the way I was supposed to find.

(10)

Bhavan said: 3 months ago

The formula for the final amount = principle(1 + Rate × Time).

(5)

Jitendra said: 9 years ago

@Gayathri.

Very good explanation, easily understand. Thanks.

Kannan said: 1 decade ago

Why should not subsract with 854? Please clear my doubt....

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