How much time will it take for an amount of Rs. 450 to yield Rs. 81 as interest at 4.5% per annum of simple interest? Choices.
A) 3.5 years	B) 4years	C) 4.5years	D) 5years	E) None of these
Explanation:   Time = (100 x 81)/(450 x 4.5) years   = 4 years.   Answer: 4years
<result>B</result>
How much time will it take for an amount of Rs. 450 to yield Rs. 81 as interest at 4.5% per annum of simple interest?