Question

A train of length 180 m is running at a speed of 54 km/h. It passes another train of length 120 m running in the opposite direction, and they completely cross each other in 12 seconds. What is the speed of the second train?

A 42 km/h
B 23 km/h
C 36 km/h
D 47 km/h
E None of these
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