How much time will it take for an amount of Rs. 600 to yield Rs. 30 as interest at 2% per annum of simple interest?  Choose the correct choice:
A) 8.1 years B) 4.2 years C) 7 years D) 6 years E) 2.5 years
Explanation:   Time = (100 x 81)/(450 x 4.5) years   = 2.5 years.   Answer: 2.5 years
<result>E</result>
How much time will it take for an amount of Rs. 600 to yield Rs. 30 as interest at 2% per annum of simple interest?