On a ground trip of 540 km in each direction Mr Armstrong av

On a ground trip of 540 km in each direction, Mr. Armstrong averaged 9 km/h more returning than he did going. If the return trip took 2 hours less than the trip going, find the time for each direction.

Solution

on hisway there speed x
on his return speed x + 9

Distance = same 540 km 1
original time