Cars overtaking:

Question

Sara left Kootenay National Park at 08:00 and drove toward Vancouver at 85 km/h. Allana left the park an hour later and drove along the same route at 100 km/h. At what time did Allana overtake Sara?

Answer 1

Sara had an 85 km head start

Allana left an hour after Sara and closed the gap at 15 kph

time needed to overtake ... 85 km / 15 kph