A sum of money at simple interest amounts to Rs.815 in 3 years and to Rs. 854…

Solution: 3

We have amount after 4 years = Rs 854

Amount after 3 years = Rs 815

Hence, interest for 4th year = Rs 854 – Rs 815

= Rs 39

Hence interest for first 3 years = Rs 39 × 3

= Rs 117

Hence amount at the starting of point = Rs 815 – Rs 117

= Rs 698