21. A man sells an article at a gain of 10%. If he had bought it for 10% less and sold it for
*10 more, he would have gained 25%. Find the cost price of the article.
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Step-by-step explanation:
Let be cost of price be "x" then cost price is "x-x/10"
Then he sold yo selling price 9f "x+x/100"
So final price is 125 rupees
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