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     EduGorilla 
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    एक रेलगाडी एक निश्चित दूरी 50 मिनट में तय करती है,यदि इसकी औसत चाल 48 किमी/घंटा है। रेलगाडी किस चाल से चलें कि यात्रा का समय 40 मिनट हो ?

    Options :-

    1. 10 किमी/घंटा

    2. 20 किमी/घंटा

    3. 40 किमी/घंटा

    4. 60 किमी/घंटा

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