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Puzzle 2
A long train, half a kilometre long, is about to enter a long tunnel. The tunnel is 10km long. If the speed of the train is 35kph, how long will it take for the entire train to pass through the tunnel - from the front of the train entering to the end of the train leaving the tunnel?
A long train, half a kilometre long, is about to enter a long tunnel. The tunnel is 10km long. If the speed of the train is 35kph, how long will it take for the entire train to pass through the tunnel - from the front of the train entering to the end of the train leaving the tunnel?
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that would depend on cargo velocity etc etc
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18 mins 51 seconds
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Almost. I think this forum may be brighter than I gave it credit for :(
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is it a eurostar train? about 10 hours?
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im obviously smarter than i look
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20 seconds
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Well 18 mins 51.4 seconds then
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I might be having a thick day but I get 18 minutes... - can you provide workings out with solution
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I make the train 1 km long, and it takes 18 mins 51 seconds to travel 11km at 35kph.
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18 mins
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front of the train has to travel 10k to leave the tunnel, and then a further 0.5k until the end of the train has left the tunnel. so a total of 10.5k. Which takes 60 x (10.5/35) = 18 minutes.
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Spot on
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Surely the front entering to the end leaving makes 1km?
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Ah, my train had a 51 second stop for a w@nk
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