I have three question I need help with:
Over a distance of 120km, the average speed of a train is 40km/h faster than that of a car. If the train covers the distance in 30 min less time, find its average speed?
To save fuel on the 240km trip to their cottage, the Nakumura family reduce their usual average speed by 20km/h. This lengthens the journey time by 1 h. What is the slower average speed?
Car A leaves Toronto for Montreal, 500 km away, at an average speed of 80km/h. Car B leaves Montreal for Toronto on the same highway 2 h later at 100km/h. How far are they from Toronto when they pass?