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Two trains 200 metres and 150 metres lon...

Two trains 200 metres and 150 metres long are running on parallel rails in the same direction at speeds of 40 km/hr and 45 km/hr respectively. Time taken by the faster train to cross the slowed train will be `72\ s e con d s` b. `132\ s e con d s` c. `192\ s e con d s` d. `252\ s e con d s`

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RS AGGARWAL-PROBLEMS ON TRAINS-All Questions
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  7. A train 125 m long passes a man, running at 5 kmph in the same directi...

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  9. A train, 240 m long, crosses a man walking along the line in opposi...

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  11. If a train takes 1.75 sec to cross a telegraphic post and 1.5 se...

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  15. A 180 -metre long train crosses another 270- metre long train runnin...

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  17. A train 108 m long moving at a speed of 50 km/hr crosses a train 11...

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  18. A train B speeding with 120 kmph crosses another train C running in...

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