Rs.8000 become Rs.10720 in a certain interval of time at the rate of 5% per annum of C.I. Find the time?  Answers
A) 6 YEARS
B) 7
C) 5
D) 3
E) 4
Explanation:   10720 = 8000(21/20)N   (21/20)6 = (21/20)N =&gt; N = 6   6 YEARSnswer: Option 6 YEARS
<result>A</result>
Rs.8000 become Rs.10720 in a certain interval of time at the rate of 5% per annum of C.I. Find the time?