A cura di: fabio scardia

SVOLGIMENTO:

$v= s/h= (600/5,0) Km/h= 120Km/h$

$h=s/v= (600/90) h= 6,7h$

$v_t= (s_1+s_2)/(t_1+t_2)= (2*600)/(5,0+6,7) Km/h= 103Km/h$