Reena took a loan of Rs. 1200 with simple interest for as many years as the rate of interest. If she paid Rs. 768 as interest at the end of the loan period, what was the rate of interest?	Choices:  A) 3.6  B) 6  C) 8  D) 24  E) None of these
Let rate = R% and time = R years.   Then, (1200 x R x R)/100 = 768   12R2 = 768   R2 = 64   R = 8.   Answer: Option 8
<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. 768 as interest at the end of the loan period, what was the rate of interest?