t=2*60=120 c s1=240 м s2=360 м v=?
v=s/t=(s1+s2)/t=(240+360)/120=5 м/с (18 км/ч)
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t=2*60=120 c s1=240 м s2=360 м v=?
v=s/t=(s1+s2)/t=(240+360)/120=5 м/с (18 км/ч)
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