Q. A train of 19 carriages, each of 60 meters length along with an engine of 60 meters length is running at a speed of 90 km/h. At what time will the train cross a 2 km long bridge?
A
2 minutes 8 seconds
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B
3 minutes 5 seconds
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C
3 minutes 12 seconds
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D
4 minutes 5 seconds
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Solution
The correct option is A
2 minutes 8 seconds Total distance =(19×60)+60+(2×1000)=3200 M
Speed of the train =90 km/hr =90×(518)=25 m/s
Thus, the time taken =320025=128 seconds =2 minute 8 seconds