A train takes ms eaddy 200 miles north and 150 miles south. The total trip took 3.5 hours what was the average velocity of the train in MPG?

The whole point of this problem is to check how well you understand the definitions of a few important quantities, like velocity, speed, distance,displacement etc.Before we begin, I just want to mention that 'MPG' is not a unit of eithervelocity or speed, but I think I know what you mean.-- For some reason, Ms. Eaddy rode 100 miles north on the train, then stayed aboard while the train turned around and took her 150 miles south.The total distance she rode was (100 + 150) = 250 miles.  But she ended up50 miles south of where she began.-- Displacement for the whole trip = distance and direction from the start point to the finish point.Displacement = 50 miles south-- Average velocity = (displacement) / (time)50 miles south / 3.5 hours = 14.29 miles per hour south