<PRE><B>Question 992875</B>
we use rate * time = distance, both trains travel the same distance so we can set their rate * time formulas equal to each other.
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let t be the time it takes the 30 km/h train to travel the distance, then
40 * (t-2) = 30 * t
40t - 80 = 30t
10t = 80
t = 8
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distance traveled by both trains is 8*30 = 240 km

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