A trader sells 40 metres of cloth for Rs.8200 at a profit of Rs.20 per metre of cloth. How much profit will the trder earn on 40 metres of cloth?
Choose the correct choice from the following answers:	A) Rs.800	B) Rs.1500	C) Rs.1000	D) Rs.1200	E) None of these
Explanation:   SP of 1 metre cloth = 8200/40 = Rs.205.   CP of 1 metre cloth = Rs.205 – 20 = Rs.185   CP on 40 metres = 185 x 40 = Rs.7400   Profit earned on 40 metres cloth = Rs.8200 – Rs.7400 = Rs.800.   Rs.800nswer: Option Rs.800
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A trader sells 40 metres of cloth for Rs.8200 at a profit of Rs.20 per metre of cloth. How much profit will the trder earn on 40 metres of cloth?