An article is sold at a gain of 16%. If it had been sold for Rs.400 more, 20% would have been gained. The cost price of the article is एक वस्तु को 16% के लाभ पर बेचा गया। यदि उसे 400 रू. अधिक पर बेचा जाता तो लाभ 20% होता। वस्तु का क्रय मूल्य क्या है?
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