Use the equation below to calculate the average speed for each problem, then complete the data table below. problem distance time speed distance/time 1. ron walks 22.5 km in 5 hours, find his speed. 22.5 km 5 hours 22.5km/ 5hr= 4.5 km/hour 2. a train covers 168 km in 4 hours. find its speed. 3. rachel travelled 240 km in 4 hours by train and then travelled 120 km in 3 hours by car and 3 km in 1/2 hour by cycle. what is the average speed during the whole journey? 4. a car moves from a to b at a speed of 50 km/hr and comes back from b to a at a speed of 30 km/hr. find its average speed during the journey.