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The compound interest on a certain sum for two successive years are ₹ 225 and ₹ 238.50. The rate of interest per annum is :
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7 1 % 2 - 5%
- 10%
- 6%
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Correct Option: D
As per the given in question ,
Difference = 238.50 – 225 = ₹ 13.50 = S.I. on ₹ 225 for 1 year
| ∴ Rate = | |
| Principal × Time |
| Rate = | = 6% per annum | |
| 225 × 1 |
Second Method :
Here, b – a = 1 and B = Rs 238.50 , A = Rs,225
| R% = |  | − 1 |  | × 100% | |
| A |
| R% = | | − 1 | | × 100% | |
| 225 |
| R% = | | | × 100% | |
| 225 |
| R% = |  |  | × 100% = 6% | |
| 225 |
