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ex 5
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Ex 5 Vvvvvvvvvaaaaaa Rrrrrroooooggggg class=

Răspuns :

t2-t1=15 m
T=d/v.unde d=distanta parcursa in 15 m
15 m=d/(90 km/h) rezulta 15 m*90 km/h rezulta
(15/60)h*90 km/h=(15*90)/60=22,5 km 
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