SOLUTION: A train 1 km long is travelling at a constant speed of 20 km/hour. It enters the tunnel which is 1 km long at 1:00 p.m. At what time does the rear of the train emerge from the tunn

Question 888712: A train 1 km long is travelling at a constant speed of 20 km/hour. It enters the tunnel which is 1 km long at 1:00 p.m. At what time does the rear of the train emerge from the tunnel?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
A train 1 km long is travelling at a constant speed of 20 km/hour. It enters the tunnel which is 1 km long at 1:00 p.m. At what time does the rear of the train emerge from the tunnel?
***
travel time=distance/speed
distance=length of tunnel+length of train=1+1=2 km
travel time=2/20=1/10 of an hour or 6 min
At what time does the rear of the train emerge from the tunnel? 1:06 p.m.
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