Question 77

A 500 m long goods train crosses a platform in 36 seconds. If the length of the platform is 220 m then what is the speed of the goods train in km/hr ?

Solution

Length of train = 500 m and length of platform = 220 m

Time taken = 36 sec

Let speed = $$x$$ m/s

Using, $$speed = \frac{distance}{time}$$

=> $$x = \frac{500 + 220}{36} = \frac{720}{36}$$

=> $$x = 20$$ m/s

$$\therefore$$ Speed in km/hr = $$20 \times \frac{18}{5} = 72$$ km/hr

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