A sum of money at simple interest amounts to 815 in 3 years and to 854 in 4 years. The sum is:
Choose the correct choice from the following answers
A) 698  B) 387  C) 373  D) 593  E) 372
A   698   S.I. for 1 year = (854 - 815)= 
<gadget id="calculator">(854 - 815)</gadget>
<output>39</output>
39.   S.I. for 3 years= (39 x 3) = 117.   Principal = (815 - 117)= 
<gadget id="calculator">(815 - 117)</gadget>
<output>698</output>
698.
<result>A</result>
A sum of money at simple interest amounts to 815 in 3 years and to 854 in 4 years. The sum is: