a train whose speed. is 20 m/sec crosses a bridge. in 10 seconds anothrr train crosses the same bridge at the speed. of 72km/hr . find the time taken by the second train to. cross the bridge
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72 km / hr=> 20 m/sec
So 2nd train has speed as the 1st one and takes 10 sec to cross the bridge .
So 2nd train has speed as the 1st one and takes 10 sec to cross the bridge .
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