Question
Noah started travelling at 5 a.m. at a speed of 81 km/h towards a town. Sebastian started travelling towards the town from the same place 4 hours later. When Noah reached the town at 5 p.m., Sebastian had another 180 km to travel. What was Sebastian's average speed?
3 m

Click button first when a symbol is required. X

Noah started travelling at 5 a.m. at a speed of 81 km/h towards a town. Sebastian started travelling towards the town from the same place 4 hours later. When Noah reached the town at 5 p.m., Sebastian had another 180 km to travel. What was Sebastian's average speed?