Aptitude - Simple Interest - Discussion

Discussion Forum : Simple Interest - General Questions (Q.No. 13)
13.
A certain amount earns simple interest of Rs. 1750 after 7 years. Had the interest been 2% more, how much more interest would it have earned?
Rs. 35
Rs. 245
Rs. 350
Cannot be determined
None of these
Answer: Option
Explanation:

We need to know the S.I., principal and time to find the rate.

Since the principal is not given, so data is inadequate.

Discussion:
97 comments Page 5 of 10.

Gopal Gupta said:   6 years ago
According to me, the question says to increase the rate by 2%. Which means if the original is R% then the new rate is (R+2)%.

So old interest.
I=PR*7/100.

And new interest.
I'=P*(R+2)*7/100.

Thus the answer can't be determined without the principal.

Sanju manna said:   6 years ago
Here the answer is 35.

Because 2% is not the increasing percentage of rate of interest it is only the increase in the total interest which is given below.
So, the 2% of 1750 is 35.

Kishan Patel said:   7 years ago
I agree with you @Sooraj.

Nagurvargani said:   4 months ago
No, @Jaimunis.

1750/7=250 is the correct answer.

Soumya Gochhayat said:   7 years ago
Let Principal=100 so,
1st interest = prt/100,
=> 1750= (100 * r * 7)/100,
=> r = 250,
Then if r increases by 2%,
then r =250*102/100 = 255,
so 2nd interest = (100 * 255 * 7)/100 = 1785,
Difference = 1785 - 1750 = 35. (ans).

Ajit arya said:   7 years ago
According to me;

Interest for 7 yr is 1750 means
For 1 yr interest is 250.
So assume the interest is 10% this way principle amount becomes 2500.
And now 8% interest for 7 yr of 2500 = 1400.
So the more interest earned = (1750-1400) = 350 ans.

Mehrzad said:   7 years ago
Yes, According to me, the answer should be 35.

Bhavuk said:   7 years ago
S.I. for 1 year = 1750/7=250.
increase by 2% = 250*2/100=255.
Every yr he would get extra 5 rs.

So, for 7 yrs = 5 * 7= 35

Uppalapu Venkatesh said:   7 years ago
I think the answer is 35.

Debjit Dey said:   7 years ago
I think the answer is 35.


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