Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Riddle: It’s a remote town of cowboys, with a fierce battle going on between rival gangs.?

It’s a remote town of cowboys, with a fierce battle going on between rival gangs. A man has to cross the town along with a sheep, a bag of grains and a wolf. Anybody crossing the town will be caught in fierce gunfire.

The only other means of crossing the town is an underground tunnel. It’s pitch dark inside the tunnel and it’s impossible to see or to cross the tunnel without light. The only source of light: Candles, sold in the town, Limited supply so candles very expensive. Each candle is 10 inches long. To prevent burning of hands by molten wax the candles have to be put out before the last inch. This way each candle can give light up to 45 minutes. Means of transport inside the tunnel, A 4-wheeled-trolley – but all wheels in dissembled condition.

Before getting the trolley rolling all the wheels have to be assembled on it. It takes 15 minutes to fit each wheel. The trolley takes one hour to travel from one end to other.

But there’s another problem. There is just enough space in the trolley to accommodate either the sheep, or the bag of grains or the wolf along with the man. If left unattended, the sheep will eat the grains and the wolf will kill the sheep.

The man has to reach the other end of the tunnel safely with the sheep, the bag of grains and the wolf. How will he do that with minimum expense i.e. using least number of candles?

2 Answers

Relevance
  • Jeff
    Lv 4
    10 years ago
    Favorite Answer

    Vannas answer is correct if we can't combine candle stumps. But if we can then only 10 candles are needed:

    each inch of the candle burns for 5 minutes so 96 inches of candle is needed. The first 10 candles will provide light for 450 minutes with 10 inches of candle left over. If you combine those into a new candle they will provide light for another 45 minutes. more than enough to complete the trip.

  • Anonymous
    10 years ago

    Each wheel takes 15 mins so it takes 1 hour to make the trolley.

    Take sheep to the end. Leave it there and come back. (2 hours)

    Take the grain to the end and bring the sheep back (2 hours)

    Take the wolf to the end, caome back and get the sheep (3 hours)

    Total 8 hours (480 minutes) divide that by 45 minutes, you get 10 2/3 candles, so you need to buy 11 of them

Still have questions? Get your answers by asking now.