Aptitude - Compound Interest - Discussion
Discussion Forum : Compound Interest - General Questions (Q.No. 2)
2.
The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 4% per annum is Re. 1. The sum (in Rs.) is:
Answer: Option
Explanation:
Let the sum be Rs. x. Then,
| C.I. = |  |
x |  |
1 + | 4 |  |
2 | - x |  |
= | |
676 | x | - x | |
= | 51 | x. |
| 100 | 625 | 625 |
| S.I. = | |
x x 4 x 2 | |
= | 2x | . |
| 100 | 25 |
 |
51x | - | 2x | = 1 |
| 625 | 25 |
x = 625.
Discussion:
149 comments Page 4 of 15.
Yeshwanth said:
9 years ago
@Gagan
SI = P * (n * r)/100.
CI = P((1 + r/100)^n - 1).
Now simplify both equations such that P comes to the left and rest to the right equate both to get r.
SI = P * (n * r)/100.
CI = P((1 + r/100)^n - 1).
Now simplify both equations such that P comes to the left and rest to the right equate both to get r.
Rajat said:
9 years ago
Can anybody tell me the formula for finding rate and principle when compound interest and simple interest are given with time 2 years and SI = 800 and CI = 850?
Sree said:
6 years ago
Here the formula:
P=D^2*100^2÷r^2:
This formula applicable for only the difference between 2 yrs.
Where;
D=1.
R=4%.
1^2*100^2÷4^2,
= 1*10000÷16,
= 625.
P=D^2*100^2÷r^2:
This formula applicable for only the difference between 2 yrs.
Where;
D=1.
R=4%.
1^2*100^2÷4^2,
= 1*10000÷16,
= 625.
VAMSI said:
5 months ago
@All.
There is a direct formula to solve the difference between CI and SI is;
Difference = Principal * Rate^2 /100^2,
1 = P*16/10000,
10000/16 = P,
P = 625.
There is a direct formula to solve the difference between CI and SI is;
Difference = Principal * Rate^2 /100^2,
1 = P*16/10000,
10000/16 = P,
P = 625.
(9)
Prabhjot Singh said:
1 decade ago
Just equate:
CI-SI = P(R/100)(R/100) for 2 years.
CI-SI = P(R/100)(R/100)(300+R/100) for 3 years.
By these formula's it is easier to calculate the result.
CI-SI = P(R/100)(R/100) for 2 years.
CI-SI = P(R/100)(R/100)(300+R/100) for 3 years.
By these formula's it is easier to calculate the result.
Yogesh patil said:
6 years ago
One of the simplest way to solve difference between si and ci by using simple formula
Diff=PR^2/100^2.
Diff=1*4^2/100*100.
Diff=1/625.
Ans=625.
Diff=PR^2/100^2.
Diff=1*4^2/100*100.
Diff=1/625.
Ans=625.
(1)
Yogesh patil said:
6 years ago
One of the simplest way to solve difference between si and ci by using simple formula
Diff=PR^2/100^2.
Diff=1*4^2/100*100.
Diff=1/625.
Ans=625.
Diff=PR^2/100^2.
Diff=1*4^2/100*100.
Diff=1/625.
Ans=625.
Yogesh patil said:
6 years ago
One of the simplest way to solve difference between si and ci by using simple formula
Diff=PR^2/100^2.
Diff=1*4^2/100*100.
Diff=1/625.
Ans=625.
Diff=PR^2/100^2.
Diff=1*4^2/100*100.
Diff=1/625.
Ans=625.
Ashok said:
7 years ago
Here is a formula for diff B/w C.I & S.I.
Diff between means C.I - S.I = P(r/100)^2.
1 = P(4/100)^2.
1 = P(1/25)^2,
1 =P(1/625),
P = 625.
Diff between means C.I - S.I = P(r/100)^2.
1 = P(4/100)^2.
1 = P(1/25)^2,
1 =P(1/625),
P = 625.
GAGAN said:
9 years ago
If the compound interest is 104 and simple interest is 100 for the time of 2 years find the rate of interest.
Can anyone solve this problem.
Can anyone solve this problem.
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