Free Set
Question
A train 180 m long crosses a pole in 9 seconds. Speed of train in km/h?
Options
A72 km/h Correct Answer
B80 km/h
C54 km/h
D60 km/h
Correct Answer & Explanation
Option A: 72 km/h
Rationale
Speed = Distance/Time. 180 m / 9 sec = 20 m/s. To convert m/s to km/h multiply by 18/5. 20 x 18/5 = 72 km/h. So train speed 72 km/h.
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