Resposta :

600/30 = 20 m/s = 216 km/h 

Jessica,

 

v = e / t

 

v = 600 m / 30 s = 20 m / s

 

20 m / s x 1 km / 1000 m x 3600s / hr = 72

 

72 km / h

 

 

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