An article is sold at 10% loss, had it been sold for Rs. 30 more the loss would have been 5% only what is the cost price of the article? एक वस्तु 10% हानि पर बेची जाती है, यदि उसे 30 रू. अधिक में बेचा जाता है तो हानि केवल 5% की होती है। उस वस्तु का लागत मूल्य क्या है?
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