Question

A trucker traveled 64 miles in one direction. The return trip was at double the speed & took 2 hours less time. Find the speed.

Answer 1

what's same about trips in both direction?

Answer 2

Let r be the speed and t be the time to travel 64 miles in the first direction.
Solve the following simultaneous equations for r and t:\[{r t = 64, 2 r ( t - 2 ) = 64} \]\[\{r\to 16,t\to 4\} \]The speed out and return was 16 mph and 32 mph respectively.