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The simple interest on a sum of money is 1/9 of the principal and the number of years is equal to rate per cent per annum. The rate per annum is
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- 3%
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1 % 3 -
3 1 % 3 -
3 % 10
Correct Option: C
As per the given in question , we have
| = | ||
| Principal | 9 |
If the annual rate of interest be r%, then
| Rate = | |
| Principal × Time |
| ⇒ r = | × | ||
| 9 | r |
| ⇒ r2 = | |
| 9 |
⇒ r = √100 / 9
| ⇒ r = | |
| 3 |
| ⇒ r = 3 | % | |
| 3 |
Second method to solve this question :
| Here, n = | , R = T | |
| 9 |
RT = n × 100
| R2 = | × 100 | |
| 9 |
| R2 = | |
| 9 |
R = √100 / 9
| R = | |
| 3 |
| R = 3 | % | |
| 3 |
