Two articles are sold for the same price,losing 10% on one and gaining 20% on other. find the cost price of each article, if Rs 40 is gained on whole transaction.
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If the two articles are of same price then they are each Rs.400
As 400×10%=40 => 360.400×20%=> 480. 400×2=800. 840-800=40.
As 400×10%=40 => 360.400×20%=> 480. 400×2=800. 840-800=40.
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