Reena took a loan of Rs. 1200 with simple interest for as many years as the rate of interest. If she paid Rs. 432 as interest at the end of the loan period, what was the rate of interest?	Pick one
A) 3.6
B) 6
C) 18
D) 24
E) None of these
Let rate = R% and time = R years.   Then, (1200 x R x R)/100 = 432   12R2 = 432   R2 = 36   R = 6.   Answer: Option 6
<result>B</result>
Reena took a loan of Rs. 1200 with simple interest for as many years as the rate of interest. If she paid Rs. 432 as interest at the end of the loan period, what was the rate of interest?