12. A 75 m long train crosses a bridge of length
300 m in 15 seconds. What is the speed of the train
in km/h?
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Step-by-step explanation:
75 m long train crosses a bridge of length 300 m in 15 seconds. What is the speed of the train in km/h?
We know Speed = distance / time
The train covers the bridge length as well as it's own.kength to cross the bridge therefore distance is 300 m + 75 m = 375 m
Distance = 375 m = 0.375 km
Time = 15 seconds = 15/3600 hour
Speed = 0.375/ 15/3600 km/h
Speed = 0.375 × 3600/15 km/h
Speed = 1350/15 km/h
Speed = 90 km per hour
Answer the train speed is 90 km per hour
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