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The simple interest on a sum of money is 8/25 of the sum. If the number of years is numerically half the rate percent per annum, then the rate percent per annumis
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- 5
- 8
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6 1 4
- 4
- 5
Correct Option: B
Let Rate = R% per annum
| ∴ Time = | years. | |
| 2 |
| ∴ Rate = | |
| Principal × Time |
| ⇒ R = | × | ||
| 25 | ( R/2 ) |
| ⇒ R² = | = 64 | |
| 25 |
⇒ R = √64 = 8% per annum
