Aptitude - Simple Interest - Discussion

As according to question the principal is same in both cases. For first case we have: 1750 = (P*R*7)/100.

Again according to question new Rate is 2% more, i.e (R + 2% of R) or (51*R)/50. Now new Interest would be: I = (P*51R*7)/(50*100).

Now solve these two equations by putting value of PR from first in second equation. The answer comes is Rs.35.

Solution given by Singh Abhishek and Rahul are also correct. My way of solving is very basic solution.

I can't understnd the solution, can you please explain clearly ?

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

As SI is directly proportional to R..

so if r is increased by 2 %

SI will also increase by 2 %

so ans is 35(2% of 1750)

let me kno if i m wrong.. :)

Sorry we cant understand ?

@ALL

SI = (PRT/100)

By applying given data in the above formula

1750 = (P x R x 7/100)

In order to find rate 'R', we need the value of 'P' (Principal amount).

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

This answer would actually keep changing according to the rate of interest that we take which will in-turn change the principal amount. That is if we take r as 5 and 7 then the answer will be Rs 700. So unless and until we are provided with the correct principal amount I guess we cannot find the exact answer.

Please correct me if I am wrong. Thank you.