on mary's walk she covered the 3- mile distance to the parkin one hour. however, the return trip took her one and a half hours. what was her average speed for the round trip? multiple choice: A. 2.4mph B. 2.5mph C. 2.8mph D.3.9mph

Question

on mary's walk she covered the 3- mile distance to the parkin one hour. however, the return trip took her one and a half hours. what was her average speed for the round trip? multiple choice: A. 2.4mph  B. 2.5mph  C. 2.8mph   D.3.9mph

wolf1728 · Answer

6 miles traveled in 2.5 hours
So average speed is 2.4 miles per hour


The INCORRECT way of doing this is
trip up - she travels at 3 mph
return trip she travels at 2 mph.
So it would seem the average speed is 2.5 mph but it isn't.