To determine which vehicles are safely obeying the 55 mph speed limit, we first need to calculate the average speed of each vehicle:
-
Ambulance:
- Distance: 150 miles
- Time: 2 hours
- Speed = Distance / Time = 150 miles / 2 hours = 75 mph
-
Sports Car:
- Distance: 216 miles
- Time: 4 hours
- Speed = Distance / Time = 216 miles / 4 hours = 54 mph
-
School Bus:
- Distance: 162 miles
- Time: 3 hours
- Speed = Distance / Time = 162 miles / 3 hours = 54 mph
-
Train:
- Distance: 182 miles
- Time: 2 hours
- Speed = Distance / Time = 182 miles / 2 hours = 91 mph
-
Limousine:
- Distance: 318 miles
- Time: 6 hours
- Speed = Distance / Time = 318 miles / 6 hours = 53 mph
Now let's summarize the average speeds:
- Ambulance: 75 mph (not obeying, exceeds limit)
- Sports Car: 54 mph (obeying, below limit)
- School Bus: 54 mph (obeying, below limit)
- Train: 91 mph (not obeying, exceeds limit)
- Limousine: 53 mph (obeying, below limit)
Based on these calculations, the vehicles that are safely obeying the 55 mph speed limit are:
- Sports Car (54 mph)
- School Bus (54 mph)
- Limousine (53 mph)
Therefore, the three vehicles that are safely obeying the speed limit are:
- A sports car travels 216 miles in 4 hours.
- A school bus travels 162 miles in 3 hours.
- A limousine travels 318 miles in 6 hours.