Mathematics · Speed, Distance and Time
एक दौड़ में, एक एथलीट पहले चक्कर (lap) में 420 मीटर की दूरी 140 सेकंड में तय करता है। वह समान दूरी का दूसरा चक्कर 70 सेकंड में तय करता है। एथलीट की औसत चाल (m/s में) क्या है?
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