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How long will it take a two mile long train going 12mph to get completely through a mile tunnel?
Wiki User
∙ 13y ago
From the time the front of the locomotive enters the tunnel . . .
-- The front of the locomotive traverses the 1-mile tunnel, bringing the center of the train to the entrance.
-- The center of the train traverses the 1-mile tunnel, bringing the end of the train to the entrance.
-- The end of the train traverses the 1-mile tunnel.
In all, the train has to travel 3 miles. At the rate of 12 mph, it takes (3/12) = 1/4 hour = 15 minutes.
Wiki User
∙ 13y ago
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How long will it take a mile long train going 20 Miles per hour to get completely through a 2 mile long tunnel?
i think its about 4900 hours.im not good at math. Right on that! The train must travel 3 miles to go thru the tunnel and to the other end. Math is 20 miles in 60 mins......therfore 3 miles in 9 mins (60/20*3)
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If you are timing from when the train first enters the tunnel until the last car exits the tunnel, then the train would travel 2 miles during this time.So 2 mi / (15 mi/hr) = (2/15) hr * 60 (min/hr) = 8 minutes
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