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A train 120 m long passes a pole in 6 seconds. What is its speed in km/h?
A60
B72
C80
D90
Answer & Solution
Correct answer: B. 72
1. Speed (m/s) = 120 / 6 = 20 m/s.
2. To km/h: 20 × 18/5.
3. = 72 km/h.
_Source: jkchrome TSD QB, p.2 — train passing pole_
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