If 180 meter long train crosses a pole in 9 seconds, find the speed of train in kilo meter/hour.
Answer & explanation
Correct answer: option 1
The correct answer is Option 1: 72 km/h
When a train crosses a pole, it travels a distance equal to its own length.
Step 1: Distance covered
Distance = 180 m
Step 2: Speed in m/s
Speed = Distance / Time
Speed = 180 / 9 = 20 m/s
Step 3: Convert to km/h
1 m/s = 3.6 km/h
Speed = 20 × 3.6
Speed = 72 km/h