How much time will take for an amount of Rs. 320 to yield Rs. 81 as interest at 4.5% per annum of simple interest?	Pick one
A) 8 years  B) 4 years  C) 3 years  D) 5 years 7 months  E) 5 years
Time = (100 * 81) / (320 * 4.5)   = 5 years 7 months   Answer: 5 years 7 months
<result>D</result>
How much time will take for an amount of Rs. 320 to yield Rs. 81 as interest at 4.5% per annum of simple interest?