You and your friend each drive 50.0 km. you travel at 90.0 km/h. your friend travels at 95 km/h. how long will your friend be waiting for you at the end of the trip?

(95km/hr)/50km=1.9
(90km/hr)/50km=1.8
1.9-1.8=0.1
so he will be waiting for .1 hrs