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20m/s=72km/h
の解説お願いします!

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✨ Best Answer ✨

1分は60秒、1時間は60分なので
20×60×60=72000
1kmは1000mなので72000÷1000で72です。

あい

ありがとうございます!
凄く分かりやすくて助かります🙏🙏

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