A man purchased a cow for Rs. 3000 and sold it the same day for Rs. 3600, allowing the buyer a credit of 2 years. If the rate of interest be 10% per annum, then the man has a gain of:  Choose the correct answer:
A) 0  B) 9  C) 8  D) 7  E) 6
Explanation:   C.P =Rs.3000   S.P =\inline {\color{Black}Rs.[\frac{3600\times 100}{100+(10\times 2)}]=Rs.3000}   Gain =0%   0nswer: 0) 0%
<result>A</result>
A man purchased a cow for Rs. 3000 and sold it the same day for Rs. 3600, allowing the buyer a credit of 2 years. If the rate of interest be 10% per annum, then the man has a gain of: