Question 1121884
the train covers the first 600 kilometers at 60 kilometers per hour.


the train covers the second 400 kilometers at 40 kilometers per hour.


rate * time = distance.


for the first 600 kilometers, the formula becomes 60 * time = 600


solve for time to get time = 600 / 60 = 10 hours.


for the last 400 kilometers, the formula becomes 40 * time = 400.


solve for time to get time = 400 / 40 = 10 hours.


the total time for the 1000 kilometers is 10 + 10 = 20 hours.


rate * time = distance becomes rate * 20 = 1000.


solve for rate to get rate = 1000 / 20 = 50 kilometers per hour.


the average speed of the train for the whole journey is 50 kilometers per hour.