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Question

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 C 400 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

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