Question 953337
A train takes two seconds to enter a tunnel which is two kilometre long. If the train is travelling at 180km per hour, how long will it take to pass completely through the tunnel?
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travel time=distance/speed
{{{180(km/hr)(hr/3600 sec)=180 km/3600 sec}}}=.05km/sec
2km/(.05 km/sec)=40 sec
how long will it take to pass completely through the tunnel=40+2=42 sec