If 180 meter long train crosses a pole in 9 seconds, find the speed of train in kilo meter/hour. Option 1: 72 km/h Option 2: 36 km/h Option 3: 20 km/h Option 4: 90 km/h

Answer: 72 km/h. Solution: To cross a pole, the train covers its own length. Speed = 180/9 = 20 m/s. Convert to km/h: 20 x 18/5 = 72 km/h.

Arithmetic

Time, Speed & Distance

Easy

If 180 meter long train crosses a pole in 9 seconds, find the speed of train in kilo meter/hour.

72 km/h

36 km/h

20 km/h

90 km/h

✅ Correct Option: 1

To cross a pole, the train covers its own length.

Speed $= \frac{180}{9} = 20$ m/s.

Convert to km/h: $20 \times \frac{18}{5} = 72$ km/h.

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