Answer:
Explanation:
They closed the 200 mile distance in 2.5 hours, so the sum of their speeds was ...
(200 mi)/(2.5 h) = 80 mi/h
If s is the speed of the slower one, then ...
s + (s+20) = 80
2s = 60
s = 30
The slower wander's speed was 30 mph; the faster one's was 50 mph.