Question

Train 'P' travels at a speed of 45 km/h and crosses train 'Q' in 15 seconds while moving in opposite directions. Determine the speed of train 'Q' if the lengths of trains 'P' and 'Q' are 120 m and 150 m, respectively.

A 12.5 km/h
B 18.5 km/h
C 19.8 km/h
D 22.5 km/h
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