Reena took a loan of Rs. 1200 with simple interest for as many years as the rate of interest. If she paid Rs. 300 as interest at the end of the loan period, what was the rate of interest? Choose the correct choice from the following options
A) 3.6
B) 6
C) 5
D) 24
E) None of these
Let rate = R% and time = R years.   Then, (1200 x R x R)/100 = 300   12R2 = 300   R2 = 25   R = 5.   Answer: Option 5
<result>C</result>
Reena took a loan of Rs. 1200 with simple interest for as many years as the rate of interest. If she paid Rs. 300 as interest at the end of the loan period, what was the rate of interest?