8.64÷0.6= 14.4 (km/h)
Thinking of problem solving: round trip 1.2 hours, then once (referring to going once or going back once) is 0.6 hours (1.2÷2).
8.64 is it a trip or a return trip.
Average speed = total distance/total time
8.64 is the total distance.
0.6 is the total time.
So 8.64÷0.6= 14.4 (km/h)
A: Xiaoming's average speed 14.4 km.
or
8.64× 2 =17.28km.
17.68 ÷1.2 =14.4 (km/h)
Thinking of solving the problem: once (referring to going once or going back once) is 8.64 kilometers, then the total round-trip distance is 17.28 kilometers (8.64×2).
Average speed = total distance/total time
Total distance = 17.28
Total time = 1.2
17.28 ÷1.2 =14.4 (km/h)
A: Xiaoming's average speed 14.4 km.