A train with 90 km/hr crosses a bridge i...

A train with 90 km/hr crosses a bridge in, 36 seconds. Another train 100 metres shorter crosses the same bridge at 45 km/hr. What is the time taken by the second train to cross the bridge? `61\ s e con d s` b. `62\ s e con d s` c. `63\ s e con d s` d. `64\ s e con d s`

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