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Distance 2: 100 miles at 40 mph
Time for distance 2: 100 / 40 = 2.5 hours
Total distance: 150 + 100 = 250 miles
Total time: 3 + 2.5 = 5.5 hours
Average speed: Total distance / Total time = 250 / 5.5 â 45.45 mph
#### 45.45
Let width = w meters
Then, length = 3w meters
Perimeter: 2(length + width) = 64 meters
2(4w) = 64