How much time will it take for an amount of 450 to yield 81 as interest at 4.5% per annum of simple interest? Select the correct option:
A) 3 years	B) 4 years	C) 6 years	D) 5 years	E) 7 years
Time = (100 x 81)/(450 x 4.5) years = 4 years.   answer 4 years
<result>B</result>
How much time will it take for an amount of 450 to yield 81 as interest at 4.5% per annum of simple interest?