# What is the sum

A sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs.854 in 4 years.The sum is:

- Rs. 650
- Rs. 690
- Rs. 698
- Rs. 700

**Answer: **

**Explanation:-**

Let the principal be Rs. X

A sum of money at the simple interest amounts to Rs. 815 in 3 years and to Rs. 854 in 4 years.

Then, the simple interest of 1 years = 854 – 815

= Rs. 39