Rs.8000 become Rs.9261 in a certain interval of time at the rate of 5% per annum of C.I. Find the time?	Choose the correct option.
A) 4 B) 6 C) 4 D) 3 E) 7
9261 = 8000(21/20)N   (21/20)3   = (21/20)N =&gt; N = 3   Answer: 3
<result>D</result>
Rs.8000 become Rs.9261 in a certain interval of time at the rate of 5% per annum of C.I. Find the time?