Question

A sum of money at simple interest to rs815in 3yeqrs and to rs 854 in4 years the sum is ?

Answer 1

According to question,

3 yr SI=815

4 yr SI=854

so I=854-815=39

SI for 1 year= 39

SI for 3 years= 39 x 3

                      =117

So,

sum(Principle)=815-117=698

hope u got it^-^.....