17. A railway train. 150 m long and travelling at a uniform speed of 45 km h crosses a tunnel900 m long. The time taken by the train to cross the tunnel is

17. A railway train. 150 m long and travelling at a uniform speed of

1.	17. A railway train. 150 m long and travelling at a uniform speed of 45 km h crosses a tunnel900 m long. The time taken by the train to cross the tunnel is
Answer» 84sExplanation:45kmph = 45*5/18= 12.5m/stotal LENGTH COVERED by train=900m + 150m = 1050mvelocity =Dispacement /timeV= 1050 m /(12.5 m/s)t = 84stime is taken to CROSS the bridge is 84 secondsHOPE THIS WILL HELP YOUPLZ.. MARK ME AS BRAINLIEST

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17. A railway train. 150 m long and travelling at a uniform speed of 45 km h crosses a tunnel900 m long. The time taken by the train to cross the tunnel is​

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17. A railway train. 150 m long and travelling at a uniform speed of 45 km h crosses a tunnel900 m long. The time taken by the train to cross the tunnel is