Question
A shopkeeper sells an article for Rs 70 and earns
thrice the profit that he would have earned on selling this article for Rs 50. Find the C.P of this article (in Rs).Solution
ATQ, the shopkeeper earns the thrice profit that he would have earned had he sold it for Rs 50.
Profit% = 3 (profit %)
S.P - C.P = 3 x (S.P - C.P)
Let C.P = x
70 - x = 3 x (50 - x)
70- x= 150 - 3x
2x= 150 - 70
x= 40
Hence, the cost price of the article = 40
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