Răspuns :
Daca in 30 min parcurge 38.5km(nu kg) , atunci in 3 ore (adica 180min) va parcurge
(38.5*180)/30=231km
(38.5*180)/30=231km
38,5km/h.....30min ?km/h ........3ore 38,5pex=39pe3=38,5*3=11,5:39=2,96 ____________