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To avoid confusion a unit of measurment is needed with all measurments. Most chart songs are around 4 minutes long but I could say they are 0.1 micro fortnights long and be equally correct. Speed in Europe is measured in km/h rather than miles/hour there speed limit signs are very confusing if you don't know the difference. Imagine going on to a main road an seeing a sign for 100! (it really means 62 and a bit miles/hour)

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14y ago
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Q: Why must a measuerment include both a number and a unit?
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