Answer:
Please Mark as Brilliant
Explanation:
To calculate Pierre's average speed, we use the formula:
Average Speed = Total Distance ÷ Total Time
In this case, Pierre cycles 18 km in 1 hour. So the total distance he cycles is 18 km, and the total time he takes is 1 hour.
Average Speed = 18 km ÷ 1 hour
Average Speed = 18 km/hour
Therefore, Pierre's average speed is 18 kilometers per hour.