Question

A 500m long train crosses an electric pole in 10 seconds.The speed of the train in km/hr is​

Answer 1

Answer:Distance is Bridge 800 metres in Time of 90 seconds

Train crosses a static electric pole in 10 seconds x the travel rate of the train.

Length of Train is therefore 100 metres

Total Length is 900 metres in 90 seconds = Travel Rate of 10 metres per second.

3,600 seconds x 10 metres per second = Speed = 36 km/h or 36,000 metres per hour

Static Pole Time of 10 seconds is x 10 metres per seconds = Train Length is confirmed correct at 100 metres in length..

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Answer 2

$we \: know \: that \: \\ speed \: = \frac{distance}{time} \\ = \frac{500m}{10sec} \\ = \frac{500 \times 10 {}^{ - 3} }{10 \times \frac{1}{60} \times \frac{1}{60} } \\ = \frac{500 \times 60 \times 60}{10 \times 1000} \\ = \frac{18 \times 10 {}^{5} }{10 {}^{4} } \\ = 180kmperhour$