How much time will take for an amount of Rs. 450 to yield Rs. 81 as interest at 4.5% per annum of simple interest?
A. 3.5 years  Pick
A) 7 years  B) 4 years  C) 5 years  D) 3 years  E) 1 years
Time = (100 * 81) / (450 * 4.5)= 
<gadget id="calculator">(100 * 81) / (450 * 4.5)</gadget>
<output>4</output>
4 years.Answer:4 years
<result>B</result>
How much time will take for an amount of Rs. 450 to yield Rs. 81 as interest at 4.5% per annum of simple interest?
A. 3.5 years