SOLUTION: Karen needs to mix some lawn fertilizer with 7 liters of water. She has two buckets that hold exactly 3 liters and 8 liters, respectively. Describe or illustrate a procedure that w

Question 49610: Karen needs to mix some lawn fertilizer with 7 liters of water. She has two buckets that hold exactly 3 liters and 8 liters, respectively. Describe or illustrate a procedure that will give exactly 7 liters of water in the 8 liter bucket.
We could not figure it out unless you had markings on the buckets but i doesn't say it does so we are at a lost.
Answer by Earlsdon(6103) (Show Source):
You can put this solution on YOUR website!
Try this: Starting with two empty buckets.
1) Fill the 8 liter-bucket and, from it fill the 3-liter bucket. Dump the 3-liter bucket. Now you have 8-3 = 5 liters in the 8-liter bucket.
2) Fill the 3-liter bucket again from the 8-liter bucket leaving 5-3 = 2 liters in the 8-liter bucket. Dump the 3-liter bucket.
3) Pour the two liters from the 8-liter bucket into the empty 3-liter bucket.
4) Fill the now-empty 8-liter bucket and pour enough water from it into the 3-liter bucket which already has two liters in it, to fill it. It will take exactly one liter to fill the 3-liter bucket leaving 7 liters in the 8-liter bucket.
Mission accomplished!