A car travels from town a to town b at an average speed of 40 miles per hour, and returns immediately along the same route at an average speed of 50 miles per hour. what is the average speed in miles per hour for the round trip?
The total distance from town a to town b is the same as town b to town a.
Average speed per hour = (40 + 50) ÷ 2
Average speed per hour = 45
----------------------------------------------------------------------------- Answer: The average speed is 45 miles/hour. -----------------------------------------------------------------------------
