Calculate Average Velocity of a Truck

[tnneal]

1 A truck travels along a staright road at 80 m/s and it travels at 40 m/s for the next 1200m. what is the average velocity?


2. ave V= change d/ time
r=dt (get the total time)




3. (1600-1200)/ 50
this is incorrect

I also tried ave V= (u+v)/t and it did not work

 

[danago]

Is that all of the information you have been given? Were you not told how long the truck is moving at 80 m/s for?