A sum of money deposited at C.I. amounts to Rs.3000 in 3 years and to Rs.3600 in 4 years. Find the rate percent?
Select:  A) 25%  B) 5%  C) 10%  D) 15%  E) 20%
3000 --- 600   100 --- ? =&gt; 20%   Answer: 20%
<result>E</result>
A sum of money deposited at C.I. amounts to Rs.3000 in 3 years and to Rs.3600 in 4 years. Find the rate percent?