What is James average speed on his outward journey

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

Step-by-step explanation:

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.