Reena took a loan of $. 1200 with simple interest for as many years as the rate of interest. If she paid $ 192 as interest at the end of the loan period, what was the rate of interest?	Pick:
A) 3.6  B) 6  C) 4  D) Cannot be determined  E) None of these
Let rate = R% and time = R years.   Then,1200 x R x R/100= 192   12R2 = 192   R2 = 16   R = 4.   Answer:4
<result>C</result>
Reena took a loan of $. 1200 with simple interest for as many years as the rate of interest. If she paid $ 192 as interest at the end of the loan period, what was the rate of interest?