Question

On mary's walk, she covered the 3- mile distance to the park in one hour. however, the return trip took her one and a half hours. what was her average speed for the round trip?

thank you so much!

Answer 1

Her average speed would be

total distance covered 6 miles (round trip) 6 miles
------------------------------------- = ------------------------------ = -----------------
total time required (1 hour + 1.5 hours) 2.5 hrs

average speed = (6 / 2.5) mph = 2.4 mph