Question

A goods train leaves a station at a certain time and at a fixed speed. After 9 hours, an express train leaves the same station and moves in the same direction at a uniform speed of 128 km/hr, this train catches up the goods train in 7 hours. Find the speed of the goods train.

A 56 km/hr
B 77 km/hr
C 84 km/hr
D 42 km/hr
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