Problema Solution
A stagecoach left dry gulch traveling east at 30 km/h. Two hours later, another stagecoach left dry gulch traveling in the same direction at 40 km/h. How many hours had the first stagecoach been traveling when the second stagecoach caught up?
Answer provided by our tutors
The hours the first stagecoach used is 6 hours
Solution: The speed of stagecoach is 30m/h, 2hour x30km/h=60km
another stagecoach's speed is 40km/h, set the hour used is X
60km+30km/h x X=40km/h x X
so X = 6hour