Calculate James’ average speed for the entire journey.

Question

James walks 1 km away from home in 15 minutes. He stops and rest for 5 minutes and then walks back home along the same path, but he spent 20 minutes to reach home.

Answer 1

Hi Mwahafa:

 

We wish to find his rate...

km per minute or km per hour:

 

His total time is:  15 + 5 + 20 = 40 minutes

His total distance is 2 km

 

Rate in km/minute:  2/40 = 1/20 = 0.05 km/minute

 

If you want km/hour then:

(0.05 km/minute)(60 minutes/hour) = 3 km/hour or kph