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The difference between the simple interest received from two different sources on ₹1500 for 3 years is 13.50. The difference between their rates of interest is:
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- 0.1%
- 0.2%
- 0.3%
- 0.4%
- 0.1%
Correct Option: C
Let r1, and r2 be the required rate of interest Then,
As per the given in question ,
| 13.50 = | - | ||
| 100 | 100 |
| = | (r1 - r2) | |
| 100 |
| r1 - r2 = | = | ||
| 450 | 90 |
| r1 - r2 = | = 0.3% | |
| 10 |
Second method to solve this question :
P1 = Rs. 1500, R1, T1 = 3 years.
P2 = Rs. 1500, R2, T2 = 3 years.
S.I. = Rs. 13.50
| 13.50 = | |
| 100 |
| = | ||
| 100 | 100 |
| (R2 - R1) = | = | ||
| 4500 | 90 |
| R2 - R1 = | = 0.3% | |
| 10 |
