Staff Selection Commission Quantitative Aptitude — Question 363

Question

A train 200m long crosses a pole in 20 seconds. Find its speed in km/h

1. 30
2. 36
3. 40
4. 45

Correct answer

B — 36

Explanation (English)

Speed = 200/20 = 10 m/s = 10 × 18/5 = 36 km/h

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