A sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs. 884 in 4 years. The sum is:  Choose the correct option.
A) s. 608
B) s. 690
C) s. 698
D) s. 700
E) s. 760
S.I. for 1 year = Rs. (884 - 815) = Rs. 69.   S.I. for 3 years = Rs.(69 x 3) = Rs. 207.   Principal = Rs. (815 - 207) = Rs. 608.   s. 608nswer: Option s. 608
<result>A</result>
A sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs. 884 in 4 years. The sum is: