Speed is the rate of change of distance. the speed of the truck for the 100 miles within 2 hours is speed = 100 miles travelled / 2 hours taken speed = 50 miles/hour assuming that the driver drives at 50 miles/hr the time taken to drive 50 miles is - 1 hour therefore to drive 300 miles - it takes - 300 miles / 50 miles/hr the time taken is - 6 hours it takes 6 hours to drive for 300 miles
