SOLUTION: Two cars belonging to two brothers are in two towns two hundred miles apart. The brothers decide to meet for a cup of coffee. The first brother starts at 9:00A.M. driving 60mph. Th

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Question 846992: Two cars belonging to two brothers are in two towns two hundred miles apart. The brothers decide to meet for a cup of coffee. The first brother starts at 9:00A.M. driving 60mph. The second brother starts at 9:00A.M driving at 40mph. What time do they meet?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
A simple way to do it is to think of
one driver as standing still and the other
driving at the sum of their speeds.
This will give you the time that they meet
+d+=+r%2At+
+200+=+%28+60+%2B+40+%29%2At+
+t+=+200+%2F+100+
+t+=+2+
9 AM plus 2 hrs = 11 AM they will meet
check:
1st driver:
+d%5B1%5D+=+60t+
+d%5B1%5D+=+60%2A2+
+d%5B1%5D+=+120+ mi
and
+d%5B2%5D+=+40t+
+d%5B2%5D+=+40%2A2+
+d%5B2%5D+=+80+
------------
+d%5B1%5D%2B+d%5B2%5D+=+120+%2B+80+
+d%5B1%5D+%2B+d%5B2%5D+=+200+
as it should