Rs.8000 become Rs.9724 in a certain interval of time at the rate of 5% per annum of C.I. Find the time?  Choose the correct choice from the following choices:
A) 6 YEARS	B) 7	C) 5	D) 3	E) 4
4xplanation:   9724 = 8000(21/20)N   (21/20)4 = (21/20)N =&gt; N = 4   Answer: Option 4
<result>E</result>
Rs.8000 become Rs.9724 in a certain interval of time at the rate of 5% per annum of C.I. Find the time?