Quantitative Aptitude • Time, Speed & WorkEasy
A train 630 m long crosses a pole in 18 seconds. What is the speed of the train in km/h?
A. 9.72 km/h
B. 144 km/h
C. 35 km/h
D. 126 km/h✓ Correct Answer
💡 Solution & Explanation
To pass a pole, the train covers only its own length. Speed = 630 m ÷ 18 s = 35 m/s. To change m/s into km/h, multiply by 18/5: 35 × 18/5 = 126 km/h.
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