To determine which vehicles are safely obeying the speed limit of 55 mph, we need to calculate the speed of each vehicle by using the formula:
\[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} \]
Now, let's calculate the speed for each vehicle:
A. Ambulance: \[ \text{Speed} = \frac{150 \text{ miles}}{2 \text{ hours}} = 75 \text{ mph} \]
B. Train: \[ \text{Speed} = \frac{182 \text{ miles}}{2 \text{ hours}} = 91 \text{ mph} \]
C. Limousine: \[ \text{Speed} = \frac{318 \text{ miles}}{6 \text{ hours}} = 53 \text{ mph} \]
D. Sports Car: \[ \text{Speed} = \frac{216 \text{ miles}}{4 \text{ hours}} = 54 \text{ mph} \]
E. School Bus: \[ \text{Speed} = \frac{162 \text{ miles}}{3 \text{ hours}} = 54 \text{ mph} \]
Now we can compare the calculated speeds with the speed limit of 55 mph:
- A. Ambulance: 75 mph (Exceeds limit)
- B. Train: 91 mph (Exceeds limit)
- C. Limousine: 53 mph (Obeys limit)
- D. Sports Car: 54 mph (Obeys limit)
- E. School Bus: 54 mph (Obeys limit)
The vehicles that are safely obeying the speed limit of 55 mph are:
- C. Limousine
- D. Sports Car
- E. School Bus
So the correct choices are C, D, and E.
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