A man purchases a cow for Rs.3000 and sold it on the same day allowing the buyer a credit of 2 years. If the buyer will pay Rs.3600 after 2 year at a rate of simple interest 50/7 % per annum, then the man has a gain of
Options:  A) Rs 171.43  B) Rs 172.43  C) Rs 173.43  D) Rs 174.43  E) Rs 175.43
value of Rs3000 after 2 years at 50/7 % S.I will be = 3000 + (3000*2*50/7)/100 = 3000 + 428.57= 
<gadget id="calculator">3000 + 428.57</gadget>
<output>3_428.57</output>
3428.57   therefore C.P of article after 2 years will be Rs 3428.57   but the buyer pays Rs 3600   therefore gain= 3600-3428.57= 
<gadget id="calculator">3600-3428.57</gadget>
<output>171.43</output>
Rs 171.43   Rs 171.43NSWER:Rs 171.43
<result>A</result>
A man purchases a cow for Rs.3000 and sold it on the same day allowing the buyer a credit of 2 years. If the buyer will pay Rs.3600 after 2 year at a rate of simple interest 50/7 % per annum, then the man has a gain of