A sum fetched a otal simple interest of Rs. 4016.25 at the rate of 9 p.c.p.a. in 5 years. What is the sum?

A. 8925
B. 8259
C. 8529
D. 8952
Ans: A

Explanation: 

Principal = Rs. [100 * 4016.25 / 9 * 5]
              = Rs. [401625 / 45]
              = Rs. 8925.