We can use the distance, rate, and time formulas.

We know that

r = d/t

Hence,

d = r * t

We have both the rate, and the time.

284.5 * 0.8 = 227.6

Therefore, the cities are 227.6 km apart.

For the sake of your learning, here is a YouTube video from which you can learn to convert km/h --> m/s

https://www.youtube.com/watch?v=AMGRQR_ANCU

With thanks,