Answer :
It will take Alex 2 hours walking the same route at 4.5 km/h because 3.6km/h times 2.5 hours was 9km, so 9km divided by 4.5km/h is 2 hours.
Answer:
2 hours
Step-by-step explanation:
3.6km/h x 2.5 hours was 9km, so 9km divided by 4.5km/h is 2 hours.