A sum of money at simple interest amounts to Rs. 840 in 3 years and to Rs. 854 in 4 years. The sum is:
Choose the correct choice from the following answers
A) 647  B) 798  C) 654  D) 847  E) 976
S.I. for 1 year = Rs. (854 - 840) = Rs. 14.   S.I. for 3 years = Rs.(14 x 3) = Rs. 42.   Principal = Rs. (840 - 42) = Rs. 798.   Answer:798
<result>B</result>
A sum of money at simple interest amounts to Rs. 840 in 3 years and to Rs. 854 in 4 years. The sum is: