Question

Train ‘A’ travelling with a speed of 42 km/h can cross a pole in 6 seconds. If the length of train ‘B’ is 10% less than that of train ‘A’ and it can cross a pole in 9 seconds then speed (in km/h) of train ‘B’ is:

A 20.2 km/h
B 22.2 km/h
C 25.2 km/h
D 21.2 km/h
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