SOLUTION: a train leaves Philadelphia for Atlanta at 12 noon, traveling 70 mph. another train leaves Atlanta for Philadelphia at 2pm traveling 60 mph. The distance from Philadelphia to Atlan

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Question 576041: a train leaves Philadelphia for Atlanta at 12 noon, traveling 70 mph. another train leaves Atlanta for Philadelphia at 2pm traveling 60 mph. The distance from Philadelphia to Atlanta is 400 miles. Where d the trains meet? When do they meet?
Answer by chana(69) About Me  (Show Source):
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a train leaves Philadelphia for Atlanta at 12 noon, traveling 70 mph. another train leaves Atlanta for Philadelphia at 2pm traveling 60 mph. The distance from Philadelphia to Atlanta is 400 miles. Where d the trains meet? When do they meet?
sol :
suppose they meet x hrs after 12. then
dist moved by first in x hrs + dist moved by second in (x - 1) hrs = 400
70 x + 60(x-2) = 400
solving for x you come to know 4 hrs after the 12.