Question

A freight train left Washington and traveled south. A diesel train left six hours later traveling at 85 km/h in an effort to catch up to the freight train. After traveling for 11 hours, the diesel train finally caught up. What was the freight train's average speed?

a) 55 km/h
b) 60 km/h
c) 65 km/h
d) 70 km/h

Answer 1

The freight train's average speed was 85 km/h.

Step-by-step explanation:

To calculate the freight train's average speed, we need to find the distance it traveled during 11 hours. Since the diesel train caught up to the freight train after traveling for 11 hours at a speed of 85 km/h, we can use the formula: average speed = distance / time. Let's assume the distance traveled by the freight train in 11 hours is 'D'. So, the average speed of the freight train is given by: 85 km/h = D / 11 hours. To find 'D', we can rearrange the formula to: D = 85 km/h * 11 hours = 935 km.

Therefore, the freight train's average speed was 935 km / 11 hours = 85 km/h.