The highway has a maximum speed limit of 55 mph. Which vehicles are safely obeying this speed limit? Check the three that apply.(3 points)

Responses

A limousine travels 318 miles in 6 hours.
A limousine travels 318 miles in 6 hours.

An ambulance travels 150 miles in 2 hours.
An ambulance travels 150 miles in 2 hours.

A school bus travels 162 miles in 3 hours.
A school bus travels 162 miles in 3 hours.

A sports car travels 216 miles in 4 hours.
A sports car travels 216 miles in 4 hours.

A train travels 182 miles in 2 hours.

1 answer

To determine which vehicles are safely obeying the 55 mph speed limit, we need to calculate the speed of each vehicle. The speed can be calculated using the formula:

\[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} \]

We'll calculate the speed for each vehicle:

  1. Limousine:

    • Distance = 318 miles
    • Time = 6 hours
    • Speed = \( \frac{318 \text{ miles}}{6 \text{ hours}} = 53 \text{ mph} \)
  2. Ambulance:

    • Distance = 150 miles
    • Time = 2 hours
    • Speed = \( \frac{150 \text{ miles}}{2 \text{ hours}} = 75 \text{ mph} \)
  3. School Bus:

    • Distance = 162 miles
    • Time = 3 hours
    • Speed = \( \frac{162 \text{ miles}}{3 \text{ hours}} = 54 \text{ mph} \)
  4. Sports Car:

    • Distance = 216 miles
    • Time = 4 hours
    • Speed = \( \frac{216 \text{ miles}}{4 \text{ hours}} = 54 \text{ mph} \)
  5. Train:

    • Distance = 182 miles
    • Time = 2 hours
    • Speed = \( \frac{182 \text{ miles}}{2 \text{ hours}} = 91 \text{ mph} \)

Now we can see which of these speeds are at or below 55 mph:

  • Limousine: 53 mph (obeying speed limit)
  • Ambulance: 75 mph (not obeying speed limit)
  • School Bus: 54 mph (obeying speed limit)
  • Sports Car: 54 mph (obeying speed limit)
  • Train: 91 mph (not obeying speed limit)

The vehicles safely obeying the 55 mph speed limit are:

  • Limousine
  • School Bus
  • Sports Car

So the selected vehicles are:

  • A limousine travels 318 miles in 6 hours.
  • A school bus travels 162 miles in 3 hours.
  • A sports car travels 216 miles in 4 hours.