If a sum of money becomes Rs. 4000 in 2 years and Rs. 5500 in 4 years 6 months at the same rate of simple interest per annum, then the rate of simple interest is? Mark as favorite Copy Link 21 and 3/7 % 21 and 2/7 % 21 and 1/7 % 21 and 5/7 % Check Answer