A train travels 72 kilometers in 1 hours, and then 64 kilometers in 1 hours. What is its average speed?

To find the average of something you must first add everything together and then divide it by the total amount of numbers you added together.

First add 72 and 64 together

72+64=136

Now divide 136 by 2

136/2=68

So the average speed of the train is 68 kilometers