Respuesta :

AL2006

Average speed during a period of time =

           (distance covered during that time) / (time)

Average speed = (12 km) / (2 hours)  =  6 km per hour .
 
iYuko
[tex]speed= \frac{d}{t} [/tex]

Distance (d)= 12km
Time (t)= 2 hours

[tex]Speed= \frac{12}{2} =6km/hr[/tex]

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