Question 99

A train of length 135 m travels at a speed of 54 kmph crosses a bridge in 27 seconds. Find the length of the bridge. (in m)

Solution

Speed of train = 54 kmph = $$54\times\frac{5}{18}=15$$ m/s

Let length of bridge = $$x$$ m

Using, speed = distance/time

=> $$15=\frac{135+x}{27}$$

=> $$135+x=27\times15=405$$

=> $$x=405-135=270$$ m

=> Ans - (A)

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