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The time it takes for a train to cross a bridge is six seconds more than that for crossing a pole. If the speed of the train is 90 km/hr and the ratio
Question



The time it takes for a train to cross a bridge is six seconds more than that for crossing a pole. If the speed of the train is 90 km/hr and the ratio of the length of the train to the bridge is 3:1, respectively, then find the length of the train (in meters).


A.

75

B.

600

C.

300

D.

150

E.

450

Correct option is E

Let the length of the train and the bridge be 3a and 1a meters respectively
The speed of the train =

ATQ,

Required length = 3a = 150×3 = 450 meters

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