<PRE><B>Question 1116182</B>
at the same moment, two trains leave Edinburgh and London.They move towards each other with constant speeds. the train from Edinburgh is moving at a speed of 60 miles per hou, and the train from London is moving at a speed of 40 miles per hour. The distance between the two places is 350 miles. how long after their departure wil they meet? 
E to L DATA:
distance = x miles ; rate = 60 mph ; time = x/60 hrs
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L to E DATA:
distance = 350-x miles ; rate = 40 mph ; time = (350-x)/40 hrs
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Equation::
time = time
x/60 = (350-x)/40
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40x = 60*350 - 60x
100x = 60*350
x = 60*3.5 = 210 miles
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Ans: time = x/60 = 210/60 = 21/6 = 7/2 = 3.5 hrs
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Cheers,
Stan H.
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