Answer:
3 meters
63 meters
Step-by-step explanation:
In order for his two breaks to occur after even distances, simply divide his total path in three:
He will reach his first break after 3 meters.
If he can only take 9 pieces at a time the number of trips required is:
Note that he will have to back to the back yard for the first three trips (traveling back the 9 meters path). The total distance traveled is:
He will travel 63 meters.