Question

Need help quick!! Cant figure this out

Answer 1

The average speed of the car, in miles per hour, from 17:30 to 19:42, is 119.167 meters per second.

Explanation:

Physically speaking, average speed (
`\bar v`), measured in miles per hour, is the distance travelled (
`\Delta s`), measured in miles, divided by time (
`\Delta t`), measured in hours. That is:

`\bar v = (\Delta s)/(\Delta t)` (1)

The time needed by the vehicle is:

`\Delta t = 72\,min* (1\,h)/(60\,min)`

`\Delta t = 1.2\,h`

If we know that
`\Delta s = 143\,mi` and
`\Delta t = 1.2\,h`, then the average velocity of the car is:

`\bar v = (143\,mi)/(1.2\,h)`

`\bar v = 119.167\,(m)/(s)`

The average speed of the car, in miles per hour, from 17:30 to 19:42, is 119.167 meters per second.