You drive a car for 2.0 h at 40 km/h then for another 2.0 h at 60 km/h. what is your average velocity

Car is driven first 2.0 hour at the velocity 40 km/h.

We know,

Distance covered = Velocity * time.

Therefore, distance covered by car in first two hours = 40 * 2.0 = 80 km.

Car is driven second 2.0 hour at the velocity 60 km/h.

Therefore, distance covered by car in first two hours = 60 * 2.0 = 120 km.

Total distnace covered = 80 km + 120 km =200 km.

Total time taken  = 2.0 + 2.0 = 4.0 hours.

Average velocity =

Plugging values in above formula, we get

= 50 km/h

Therefore, average velocity is 50 km/h.