Question 64

A train of length 350 m crosses a bridge of length 250 m in 20 seconds. What is the speed of the train (in km/h)?

Solution

Given, length of the train $$(L)$$ = 350 m

Length of the bridge $$(l)$$ = 250 m

Time taken by train to cross the bridge $$(t)$$ = 20 sec

$$\therefore\ $$Speed of the train = $$\frac{L+l}{t}=\frac{350+250}{20}=30$$ m/sec = $$30\times\frac{18}{5}$$ km/h = 108 km/h

Hence, the correct answer is Option C

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