A railway passenger counts the telegraph posts on the line as he passes them while travelling; If the poles are 50 m apart and the train is going at the speed of 48 km/hr. How many posts will be passed by the train per minute?

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Mathematics Foundation

Time Speed Distance

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Speed of the train = 48 km/hr = $\frac{40}{3}$ m/sec

Distance travelled in 1 minute = $\frac{40}{3} \times 60$ = 800m

If the posts are 50 m apart, then the number of posts that passenger would pass per minute = $\frac{800}{50}$ = 16