Problem Question:

Rashad started The 780km drive from Sault st. Marie to Ottawa at 09:00.
His average speed was 100km/h. Two hours later Tyson left Ottawa for Sault St. Marie. He drove at 80km/h on the same highway. How far from Ottawa, and what time of day did they meet?

when Tyson left at 11:00, Rashad had already gone 200km, so the two were 580 km apart.

They approached each other at 180 km/hr, meaning they met in 3 2/9 hours.

So, by the time they met at 2:13:20, Tyson had gone 257.8 km.