How much time will take for an amount of Rs. 75 to yield Rs. 81 as interest at 4.5% per annum of simple interest?
Pick:	A) 22	B) 19	C) 15	D) 30	E) 24
Time = (100 * 81) / (75 * 4.5)= 
<gadget id="calculator">(100 * 81) / (75 * 4.5)</gadget>
<output>24</output>
24 years'   Answer:24
<result>E</result>
How much time will take for an amount of Rs. 75 to yield Rs. 81 as interest at 4.5% per annum of simple interest?