Answer:
18 kilometers per hour, 54 kilometers in 3 hours
Step-by-step explanation: you first times 5 and 60, because there are 60 seconds in a minute. Then you get 300, you have to times 300 by 60 because there is 300 meters in every minute and there are 60 minutes in onr hour.you get 18,000 meters. 1,000 meters gives you one kilometer so you get 18, then you times 18 by 3 and you get 54.