Question 52

An 800-metre long train crosses a stationary pole in 15 seconds. What is the speed of the train?

Solution

An 800-metre long train crosses a stationary pole in 15 seconds.

speed of the train = $$\frac{length\ of\ train}{time}$$

= $$\frac{800}{15}$$

= $$\frac{160}{3}$$ m/s

We know that 1 km = 1000 m and 1 hour = 3600 seconds.

= $$\frac{160}{3}\times\ \frac{3600}{1000}$$ km/h

= $$16\times12$$ km/h

= 192 km/h

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