SOLUTION: A freight train and an express train leave towns 390km apart, traveling toward one another. The freight train travels 30km per hr slower than the express train. They pass one anoth

Question 269831: A freight train and an express train leave towns 390km apart, traveling toward one another. The freight train travels 30km per hr slower than the express train. They pass one another 3 hr later. What are their speeds?
Answer by drk(1908) (Show Source): You can put this solution on YOUR website!
This is an RTD problem. Here is a table based on the given information
trains . . . . . . . . .rate . . . . . . . . .time . . . . . . . . .distance
freight. . . . . . . . r - 30 . . . . . . . . .3 . . . . . . . . . . 3r - 90
express. . . . . . . .r . . . . . . . . . . . . 3 . . . . . . . . . . . 3r
totals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .390
Look at the last column, we get

simplify to get

add 90 to get

divide to get
express:
freight:
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