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Q 2441180023.     A train travels at a certain average speed for a distance
of 63 km and then travels a distance of 72 km at an
average speed of 6 km/hr more than its original speed.
If it takes 3 hours to complete the total journey, what
is the original speed of the train in km/hr?
IAS 2013 Prelims
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)