SOLUTION: City A and City B are 400 km apart. If a train leaves A in the Direction of B at 50 kph, how long will it take before the train meets another train, going from B to A, at a speed o

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: City A and City B are 400 km apart. If a train leaves A in the Direction of B at 50 kph, how long will it take before the train meets another train, going from B to A, at a speed o      Log On

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Question 753527: City A and City B are 400 km apart. If a train leaves A in the Direction of B at 50 kph, how long will it take before the train meets another train, going from B to A, at a speed of 30 kph and leaves at the same time as the first train?
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
When will the sum of their distances traveled equal 400 km?
Train A, 50%2Ah
Train B, 30%2Ah
h is hours of time

50h%2B30h=400
find h.