A car travels 60 miles in 1.5 hours. What is its average speed?

To determine the average speed of the car, you can use the formula for average speed, which is the total distance traveled divided by the total time taken. In this case, the total distance is 60 miles and the total time is 1.5 hours.

Calculating the average speed involves dividing the distance by the time:

[

\text{Average speed} = \frac{\text{Total distance}}{\text{Total time}} = \frac{60 \text{ miles}}{1.5 \text{ hours}}

]

When you perform the division:

[

\frac{60}{1.5} = 40 \text{ mph}

]

This result shows that the average speed of the car is 40 mph. Therefore, the correct answer is 40 mph, as it is the only value that accurately reflects the calculation of distance over time.