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Q.

A 150 m long train is moving with a uniform velocity of 45 km/h. The time taken by the train to cross a bridge of length 850 meters is

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a

68 s

b

80 s

c

56 s

d

92 s

answer is C.

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Detailed Solution

The displacement of the front of the train is (150 + 850) m = 1000 m,

$Time taken = \frac{1000}{45 \times \frac{5}{18}} = 80 s$

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