A train 100 m long is running with speed of 40 km/h. In what time shall it cross a bridge of 1 km length?

100 s

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95 s

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99 s

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101 s

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Solution

The correct option is C
99 s

Distance = 100 + 1000 = 1100 m

Speed = 40 km/h = 11.11 m/s

Time = Distance/Speed = 1100/11.11 = 99 s

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