A train of length 50 m is moving with a constant speed of 10 m/s.Calculate the time taken by the train to cross an electric pole and a bridge of length 250 m.

25 sec

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30 sec

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45 sec

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15 sec

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Solution

The correct option is C 30 sec
Distance covered by train the cross the bridge (from front of engine to back of last wagon )
$d = 250 + 50 = 300 m$

Speed of train $v = 10 m / s$

Thus time taken $t = \frac{d}{v}$

$⟹ t = \frac{300}{10} = 30 s e c$

Option B is correct.

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