A sum of money amounts to Rs. 9800 after 5 years and Rs. 12015 after 8 years at the same rate of simple interest. The rate of interest per annum is?
Choose one:
A) 12.05%	B) 5%	C) 13.05%	D) 22.05%	E) 18.05%
S.I. for 3 years = (12015 - 9800) = Rs. 2215   S.I. for 5 years = Rs. 2215/3 * 5 = Rs. 3691.   Principal = (9800 - 3675) = Rs. 6108   Hence, rate = (100 * 3691) / (6125 * 5) = 12.05%   12.05%NSWER:12.05%
<result>A</result>
A sum of money amounts to Rs. 9800 after 5 years and Rs. 12015 after 8 years at the same rate of simple interest. The rate of interest per annum is?