Question 1115131
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<pre>
The distance of the train A from the station is 40*t.


The distance of the train B from the station is 60*(t-6).


At the catching moment the distances are the same


40t = 60*(t-6),

40t = 60t - 360

360 = 60t - 40t

20t = 360  ====>  t = {{{360/20}}} = 18.


<U>Answer</U>.  It will take train B 18-6 = 12 hours to catch up the train A.
</pre>

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