A sum of money at simple interest amounts to Rs. 820 in 3 years and to Rs. 854 in 4 years. The sum is:
Choose the most appropriate option.
A) 647  B) 718  C) 654  D) 847  E) 976
S.I. for 1 year = Rs. (854 - 820) = Rs. 34.   S.I. for 3 years = Rs.(34 x 3) = Rs. 102.   Principal = Rs. (820 - 102) = Rs. 718.   Answer:718
<result>B</result>
A sum of money at simple interest amounts to Rs. 820 in 3 years and to Rs. 854 in 4 years. The sum is: