.
x mph = speed of the slower train.
(x+20) mph = speed of the faster train.
Total distance equation
4.5x + 4.5(x+20) = 459.
Divide both sides by 4.5
x + (x+20) = 102
2x = 102 - 20 = 82
x = 82/2 = 41.
ANSWER. The speed of the slower train is 41 mph. That of the faster train is 41+20 = 61 mph.
Solved.
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- Travel and Distance problems for two bodies moving in opposite directions
- Travel and Distance problems for two bodies moving in the same direction (catching up)
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