Aptitude - Simple Interest - Discussion

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.

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.

Assuming the rate of interest to be 10% in 1st case we get;
P=(1750*100)/(10*7),
P=2500.

So applying the principal in 2nd case we get,
S.I=(2500*10.2*7)/100.

Here, the rate of interest is taken to be 10.2 since 2% more of 10 that is assumed in 1st case.

S.I=1785.

So 2nd S.I - 1st S.I will be;

1785-1750=35 This should be the answer but as the rate is not mentioned and it is assumed so the answer may vary from person to person and also method to method of solving.

Here, the 2% more interest means in absolute S.I terms, as in if it was 6% interest then how much more would you earn if you had 8% interest, not 6% x 1.02 which is 6.12%. Since we cannot calculate the S.I itself, we will never be able to find the answer. Please anyone help me to get it.

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).

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.

As per data specified p and yr are constant only rates changes.
Moreover, SI is directly proportional.
So, I think the answer would be 35.

Yes, According to me, the answer should be 35.

I think the answer is 35.

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