A train left for London, and after 9 hours later, a car traveling 80 miles per hour tried catching up to the train. After 3 hours, the car caught up.What was the train's average speed

Given that the train left for London, and after 9 hours later, a car traveling 80 miles per hour tried catching up to the train. After 3 hours, the car caught up

Which means that the car travelled the same distance in 3 hours as the train travelled in 9 + 3 = 12 hours

Let the distance be d

Given the speed of car is 80 miles per hour

We know that [tex]speed=\frac{distance }{time}[/tex]

[tex]80=\frac{d}{3}[/tex]

d = 240 miles

Now for the train Average speed = total distance / total time taken

Average speed of the train = [tex]\frac{240}{12}[/tex] = 20 miles per hour