SOLUTION: Two cars A and B average speeds of 30 and 40 mi/hr respectively are 280 miles apart. They start moving toward each other at 3:00 p.m. At what time will they meet?

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Question 424235: Two cars A and B average speeds of 30 and 40 mi/hr respectively are 280 miles apart. They start moving toward each other at 3:00 p.m. At what time will they meet?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
You can think of one car as standing still and the
other approaching it at the sum of their speeds
280+=+%2830+%2B+40%29%2At
t+=+280%2F70
t+=+4 hrs
They will meet at 3:00 PM + 4 hrs = 7 PM