Atrain moved at a speed of 90 miles per hour for 2hours and then slowed down to 72 miles per hour.
a) find the total number of miles the train traveled.
b) calculate the average speed of the train.

Does the train go 72mph for 2 hours as well? if so the answer would be 324 because you have to add 90 twice scene it goes at that speed for 2 hours thats 180. assuming  the train goes 72 mph for 2 hours it would be 144. then add 180 and 144 and you get 324 merry christmas and a happy newyear to you and your family