Latha took a loan of Rs. 2000 with simple interest for as many years as the rate of interest. If she paid Rs.180 as interest at the end of the loan period, what was the rate of interest?	Choices:
A) 5
B) 4
C) 7
D) 3
E) 9
Let rate = R% and time = R years.   Then, (2000 * R * R) / 100 = 180   20R2 = 180   R2 = 9 =&gt; R = 3   Answer:3
<result>D</result>
Latha took a loan of Rs. 2000 with simple interest for as many years as the rate of interest. If she paid Rs.180 as interest at the end of the loan period, what was the rate of interest?