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If you have two drums one is three gallons and the other is five if you have an unlimited supply of water but need to get exactly four gallons how could you do it?
Wiki User
∙ 14y ago
Fill the 5-gallon drum. Pour the contents into the 3-gallon drum, filling it. Now you have 2 gallons left in the big one.
Empty the 3-gallon drum. Pour the 2 gallons into it. At this point there is room for one more gallon.
Now refill the 5-gallon drum and pour off as much as it takes to fill up the small one. That means you are removing one gallon.
Now you have exactly 4 gallons in the 5-gallon drum.
or Fill the 3 gallon drum. Pour the contents into the 5 gallon drum. Refill the the 3 gallon drum and pour the contents into the 5 gallon drum until it is full. Empty the 5 gallon drum. You have 1 gallon left in the 3 gallon drum. Pour the remaining 1 gallon into the 5 gallon drum. Re-fill the 3-gallon drum and pour that into the 5 gallon drum giving you 4 gallons. or Tip the 5 gallon drum and fill it until water is level to both the bottom and spilling out the top; next do the same with the 3 gallon drum; then pour the half full 3 gallon drum into the half full 5 gallon drum, rusulting in 2.5 plus 1.5 equals 4 gallons! or
Watch Die Hard 3 for the answer.
Wiki User
∙ 14y ago
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