college physics
posted by Mandy .
A car is driven from point A to B at a constant speed of 25.0 m/s along a straight line, and then back from point B to A at a constant speed of 20.0 m/s. The values of the average speed over the entire trip is?

college physics 
bobpursley
avg speed= total distance/total time
for total time, figure the time each way, and add.
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