1.  A sum of money amounts to Rs. 9800 after 5 years and Rs. 12005 after 8 years at the same rate of simple interest. The rate of interest per annum is: 

Answer: Option C Explanation: S.I. for 3 years = Rs. (12005  9800) = Rs. 2205.
Principal = Rs. (9800  3675) = Rs. 6125.
