A sum of money at simple interest amounts to Rs. 825 in 3 years and to Rs. 854 in 4 years. The sum is:	Select the correct option
A) s. 650 B) s. 690 C) s. 698 D) s. 738 E) s. 720
S.I. for 1 year = Rs. (854 - 825) = Rs. 29.   S.I. for 3 years = Rs.(29 x 3) = Rs. 87.   Principal = Rs. (825 - 87) = Rs. 738.   Answer: Option s. 738
<result>D</result>
A sum of money at simple interest amounts to Rs. 825 in 3 years and to Rs. 854 in 4 years. The sum is: