The difference between the compound interest and the simple interest accrued on an amount of Rs. 18,000 in 2 years was Rs. 405. What was the rate of interest p.c.p.a. ?	Pick.
A) 33  B) 38  C) 37  D) 15  E) 28
Explanation:   Let the rate be R% p.a. Then,   Rate = 15%.   Answer: 15) 15%
<result>D</result>
The difference between the compound interest and the simple interest accrued on an amount of Rs. 18,000 in 2 years was Rs. 405. What was the rate of interest p.c.p.a. ?