- A20 km/h
- B72 km/h
- C45 km/h
- D27 km/h
Step-by-Step Solution
Distance m in 12 s m/s km/h. (45 km/h uses only the platform; 20 is m/s.)
Answer: B) 72 km/h
A metro train 90 m long crosses a 150 m station platform in 12 seconds. What is its speed in km/h?
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