A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is…
2025
A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?
- A.
120 metres
- B.
180 metres
- C.
324 metres
- D.
150 metres
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Correct answer: D
Answer: 150 metres
Work: Convert the speed to metres per second, then use distance = speed × time.
Step 1: Convert speed: 60 km/hr × 5/18 = 60 × 5/18 = 50/3 m/s (≈16.67 m/s).
Step 2: Multiply by time: distance = (50/3) × 9 = 50 × 3 = 150 m.
Common mistake: forgetting to convert km/hr to m/s using ×5/18 or making an arithmetic error during multiplication.