A tradesman sold an article at a loss of 20%. If the selling price had been increased by 100 rupees, there would have been a gain of 5%. What was the cost price of the article?
A
350 rupees
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B
430 rupees
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C
400 rupees
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D
600 rupees
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Solution
The correct option is C400 rupees Let C.P. of article be x rupees. Then, (105% of x)−(80% of x)=100 ⇒25% of x=100 ⇒x=400
So, C.P. =400 rupees