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Physics, 17.10.2021 06:10 sfigel3160

Một người đi xe đạp khi lên dốc với tốc độ không đổi 10 km/h. Tại đỉnh dốc người đó quay lại cũng quãng đường đó với tốc độ 40km/h. Tính tốc độ trung bình của người đi xe
đạp đối với toàn bộ quãng đường đã đi được.

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Một người đi xe đạp khi lên dốc với tốc độ không đổi 10 km/h. Tại đỉnh dốc người đó quay lại cũng...
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