Two cars leave from the same location but travel in opposite directions. The first car travels an average of 50 mi/hr and leaves 15 min before the second car, which travels an average of 55 mi/hr. How long each car travel before they are 200 mi apart?
1 Answer
Apr 27, 2016
1.79 hours
Explanation:
If we define the time t=0 as when the second care leaves.
Before the second care leaves, the first car travels a distance of:
(since 15min = 0.25hr)
The total distance car 1 travels will be:
And car 2 travels a distance in the opposite direction:
The total distance between them will be:
We want to know t when this equals 200 miles. So:
Solving for t:
