A car averages 80 km/h travelling from A to B, and then on the return trip the car averages 60 km/h from B to A. Write the average speed of the car, V, as a function of x, where x is the distance from A to B.
Not sure what to use.
The Attempt at a Solution
Vavg = [80 km/h(x) + 60 km(x)]/2
Obviously it's wrong =/