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?
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 1 of 10.
Jayden Akpalu said:
2 years ago
I think the answer should be 35.
The confusion is on whether the rate increases by 2% or the interest itself increases by 2%.
So, let us consider both cases.
CASE 1(Rate 2% increase):
SI = Rs. 1750.
T = 7 years.
R = ?
Let R = R.
P = (SI * 100)/ (R * T)
= (1750 * 100)/(R * 7)
= 25000/R.
Now, if rate is increased by 2%, the new rate = R + (2/100)R.
= 1.02R.
New SI = P * R *T/100.
= (25000/R * 1.02R * 7)/ 100,
= Rs. 1785.00.
Increase in SI = Rs. (1785 - 1750).
= Rs. 35.
CASE 2(SI 2% increase):
Initial SI = Rs. 1750;
After 2% increase, new SI = 1750 + (2/100)*1750,
= Rs.1785.
Increase in SI = Rs.( 1785 - 1750).
=Rs. 35.
The confusion is on whether the rate increases by 2% or the interest itself increases by 2%.
So, let us consider both cases.
CASE 1(Rate 2% increase):
SI = Rs. 1750.
T = 7 years.
R = ?
Let R = R.
P = (SI * 100)/ (R * T)
= (1750 * 100)/(R * 7)
= 25000/R.
Now, if rate is increased by 2%, the new rate = R + (2/100)R.
= 1.02R.
New SI = P * R *T/100.
= (25000/R * 1.02R * 7)/ 100,
= Rs. 1785.00.
Increase in SI = Rs. (1785 - 1750).
= Rs. 35.
CASE 2(SI 2% increase):
Initial SI = Rs. 1750;
After 2% increase, new SI = 1750 + (2/100)*1750,
= Rs.1785.
Increase in SI = Rs.( 1785 - 1750).
=Rs. 35.
(26)
Abhishek said:
4 years ago
I think 35 is right answer.
1750/7=250 is S.I. Per year.
2% more of 250=255.
Therefore 5 is more.
5*7=35 is right.
1750/7=250 is S.I. Per year.
2% more of 250=255.
Therefore 5 is more.
5*7=35 is right.
(9)
DEV said:
3 years ago
I think the answer should be 35.
(8)
Nagesh said:
3 years ago
I think the answer should be 245.
(7)
Xayo said:
4 years ago
Here in the first case;
P * 7 * R/100 = 1750 -----> (1)
And in the second case interest is increased by 2%( Rate of interest).
P*7*(R+2)/100=? -------> (2)
HERE THE Rate of Interest is R+2 because the 100 in the demo is for the Rate of Interest Calculation i.e., R/100 is R%.
So, by the two equations, we get 3 unknown values. But to solve 3 unknown values we need 3 equations. hence there is no solution for this question unless one of the 3 unknown values is given.
P * 7 * R/100 = 1750 -----> (1)
And in the second case interest is increased by 2%( Rate of interest).
P*7*(R+2)/100=? -------> (2)
HERE THE Rate of Interest is R+2 because the 100 in the demo is for the Rate of Interest Calculation i.e., R/100 is R%.
So, by the two equations, we get 3 unknown values. But to solve 3 unknown values we need 3 equations. hence there is no solution for this question unless one of the 3 unknown values is given.
(7)
Dhananjay said:
12 months ago
Yes, I agree, the answer is 35.
(5)
Jaimunis said:
6 months ago
The total interest received for one is 350 (1750/7 = 350).
Then assume that the 350 you received is for 98%.
And do like this (350/98)*100 = 355.
So, the additional interest received is 5 then (5*7 = 35) then the answer is 35.
Then assume that the 350 you received is for 98%.
And do like this (350/98)*100 = 355.
So, the additional interest received is 5 then (5*7 = 35) then the answer is 35.
(4)
Lowkeytt said:
4 years ago
The answer is c:350 Rs.
Lets assume the simple interest rate is 10%, if you apply the formula the principal will be 2500. 2% Increase in interest rate with 2500 as a principle will yield an interest amount of 2100.
So, the difference will be 350.
Lets assume the simple interest rate is 10%, if you apply the formula the principal will be 2500. 2% Increase in interest rate with 2500 as a principle will yield an interest amount of 2100.
So, the difference will be 350.
(2)
Surya said:
4 years ago
It's not 35,
Here its written, the rate increased 2% more means, new rate= (R+2) not (102R/100) ,
So, the answer cannot be found unless we have the principal.
Here its written, the rate increased 2% more means, new rate= (R+2) not (102R/100) ,
So, the answer cannot be found unless we have the principal.
(2)
Puthiabala said:
5 years ago
The Answer is 35.
Equation One = 7*P*R/100=1750
to be found (7*P*R+2)/100 = ?
we can rewrite as (7*P*R)100 + 2/100 = ?
and then 1750 + 2/100 = 35.
Equation One = 7*P*R/100=1750
to be found (7*P*R+2)/100 = ?
we can rewrite as (7*P*R)100 + 2/100 = ?
and then 1750 + 2/100 = 35.
(1)
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