S = utS = 20 km/h 6 hS = 120 km
u = S/tu = 810 km / 9 hu = 90 km/h
t = S/ut = 350 km / 50 km/ht = 7 hours.
S = ut
S = 20 km/h 6 h
S = 120 km
u = S/t
u = 810 km / 9 h
u = 90 km/h
t = S/u
t = 350 km / 50 km/h
t = 7 hours.