- A20 km/h
- B40.3 km/h
- C31.7 km/h
- D72 km/h
Step-by-Step Solution
Distance = 220 + 280 = 500 m. Speed m/s km/h. (40.3 km/h uses only the bridge.)
Answer: D) 72 km/h
A 220 m long train crosses a 280 m bridge in 25 seconds. What is its speed in km/h?
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