Mathematics · Time and Distance
एक ट्रेन एक समान गति से 400 किमी की दूरी तय करती है। यदि गति 10 किमी/घंटा अधिक होती, तो उसी यात्रा में 2 घंटे कम लगते। यात्रा को पूरा करने के लिए इसके द्वारा लिया जाने वाला सामान्य समय (घंटों में) क्या है?
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10
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