What is the average velocity of a dragster that starts from rest at the starting line and finishes a race at 2600 m/s in 12 seconds?

Using the equation v (avg) = distance/time

and the equation v=v (original) + a (t)

solve for acceleration

2600=0+a (12)

a=216.66666 m/s^2

Then, you use the equation

v^2=v (original) + 2a * (change in x)

2600^2=2 (216.666666) * change in x

6760000/2/216.666666 = 15600 meters which is the length of the race

Then using v (avg) = x/t

15600/12 = 1300 m/s