A sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs. 854 in 4 years. The sum is : Options
A) 700 B) 690 C) 650 D) 698 E) 728
Explanation :   Simple Interest (SI) for 1 year = 854-815= 
<gadget id="calculator">854-815</gadget>
<output>39</output>
39   Simple Interest (SI) for 3 years= 39 × 3 = 117   Principal = 815 - 117 = Rs.698   Answer : Option 698
<result>D</result>
A sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs. 854 in 4 years. The sum is :