Rs. 30,600 was lent in two parts, partly @ 9% and the rest @ 12% simple interest. The total interest received after 3 years is 5841 Rs. , The ratio of the money lent at 9% to that at 12% is?

22 : 47 11 : 47 47 : 22 47 : 11

47 : 22

Rate of interest = \(\frac{5841 × 100}{30600 × 3}\) [ \(\frac{Interest × 100}{principal × time}\)] = \(\frac{1947}{306}\) = 6.36% Now, using alligation method: