數學題...............

2007-01-24 4:39 am

一輪賽車用了5小時完成了900km的賽事,求該賽車的速率.

答案以m/s為單位

回答 (7)

2007-01-24 4:48 am

✔ 最佳答案

賽車速率=900x1000÷(5x60x60)=50m/s

Answer is 50m/s

參考: Me

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2007-01-26 9:29 am

the answer is correct but other people is faster and more detail

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2007-01-25 3:26 am

該賽車的速率=
900/5
=180(km/h)
=180/3.6(m/s)
=50m/s

∵1km/h=1*10^3m/3.6*10^3s
∴1km/h=1/3.6m/s

∴1m/s=3.6km/h
例如:20m/s=72km/h
10m/s=36km/h

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2007-01-24 7:54 pm

5小時=300分鐘=18000秒
900km=900000m
所以速率=50m/s

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2007-01-24 4:46 am

0.5m/s

參考: me

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2007-01-24 4:45 am

time=5小時=5*60minutes = 5*60*60 seconds
distance=900km=900*1000m
速率=distance/time=(900*1000)/(5*60*60)=50m/s

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2007-01-24 4:45 am

900/5=180m/s

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