Answer :
Time = 7200 s. 3600 s = 1hour.
7200s = 7200 / 3600 = 2 hours.
Speed = Distance / time = 150 km / 2 hours = 75 km/h
7200s = 7200 / 3600 = 2 hours.
Speed = Distance / time = 150 km / 2 hours = 75 km/h