How much time will take for an amount of Rs. 300 to yield Rs. 81 as interest at 4.5% per annum of simple interest?	Select: A) 5 years B) 6 years C) 7 years D) 12 years E) 15 years
Time = (100 * 81) / (300 * 4.5)= 
<gadget id="calculator">(100 * 81) / (300 * 4.5)</gadget>
<output>6</output>
6 years   ANSWER:6 years
<result>B</result>
How much time will take for an amount of Rs. 300 to yield Rs. 81 as interest at 4.5% per annum of simple interest?