Simpson drives his car with an average velocity of 48.0 km/h to the east. How long will it take him to drive 144 km on a straight highway?

144/48 = ?

To find the time it will take for Simpson to drive 144 km, we need to use the equation:

Time = Distance / Velocity

In this case, the distance is 144 km and the velocity is 48.0 km/h. Plugging these values into the equation, we have:

Time = 144 km / 48.0 km/h

Now, to calculate this we simply divide 144 by 48.

Time = 3 hours

Therefore, it will take Simpson 3 hours to drive 144 km on a straight highway.