The simple interest on a sum of money is \(\frac{1}{9}\) of the principal and the number of years is equal to rate percent per annum. Find the rate percent. |
3\(\frac{1}{3}\)% 3\(\frac{2}{3}\)% 2\(\frac{1}{3}\)% 2\(\frac{1}{2}\)% |
3\(\frac{1}{3}\)% |
Principal : S.I. = 9 : 1, Total rate of interest = \(\frac{1}{9}\) × 100 = \(\frac{100}{9}\) % ⇒ Rate of Interest × Time = Total Rate of Interest R = T (given) Therefore, R × R = Total Rate of Interest R2 = \(\frac{100}{9}\) R = \(\frac{10}{3}\) = 3 \(\frac{1}{3}\)% |