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✨ Best Answer ✨

1mL=1㎤
1L=1000mL=1000㎤
時速72km=分速72÷60km
時速72km=分速1.2km
分速1.2km=秒速1.2÷60km
分速1.2km=秒速0.02km
0.02km=20mなので
時速72km=分速1.2km=秒速20m
間違ってたらすみません

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