SOLUTION: Ok, so town A and town B are 100 miles apart. Car A is leaving from town A and traveling 60mph, and car B is leaving from town B and traveling 50mph. How long before they collide

Question 110384: Ok, so town A and town B are 100 miles apart. Car A is leaving from town A and traveling 60mph, and car B is leaving from town B and traveling 50mph. How long before they collide? I know it has something to do with the D=r*t formula...I'm just not sure how to figure this one out. Thanks!
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
They leave at the same time and collide at the same time, so
If I write and , then
t is the same for both, and I can write
and , , so

And I know , so I can say

Now I have

hrs
hrs x min/hr = min
min x sec/min = 32.7272 sec
So, the cars will collide in 54 min 33 sec approximately
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