1.  The difference between the simple interest received from two different sources on the ₹ 1500 for 3 years is ₹ 13.50. The difference between their rates of interest is :
A. 0.1%
B. 0.2%
C. 0.3%
D. 0.4%
E. None of these

Answer: Option C

Explanation:

1500 x R1 x 3 - 1500 x R2 x 3 = 13.50
100 100

<=> 4500 R1 - R2 = 1350

<=> R1 - R2 = 1350 / 4500 = 0.3%