you have three jugs and a river of water. The jugs are known to hold exactly 3, 7, and 10 liters.
How can you use these jugs to measure exactly 5 liters of water?
Scoop water using the 3 liter jug and poor it into the 10 liter jug.
Do this 3 times.
You should have 9 liters in the 10 liter jug.
Pour from the 10 liter jug into the 7 liter jug until the 7 liter jug is full.
You should have 2 liters in the 10 liter jug now.
Scoop up another 3 liter jug of water and dump it into the 10 liter jug (that has 2 liters in it).
That gives you exactly 5 liters of water!
Thank you, Bobby! I puzzled over this question for at least an hour -- and couldn't figure it out!
No problem! These kinds of probs are fun =]
To measure exactly 5 liters of water using the three jugs, you can follow these steps:
Step 1: Fill the 10-liter jug completely with water from the river.
Step 2: Pour the water from the 10-liter jug into the 7-liter jug, until the 7-liter jug is completely full. This leaves you with 3 liters of water in the 10-liter jug.
Step 3: Empty the 7-liter jug.
Step 4: Pour the 3 liters of water from the 10-liter jug into the empty 7-liter jug.
Step 5: Refill the 10-liter jug completely from the river.
Step 6: Pour water from the 10-liter jug into the 7-liter jug until the 7-liter jug is full. This will leave you with 6 liters of water in the 10-liter jug.
Step 7: Empty the 7-liter jug.
Step 8: Pour the remaining 6 liters of water from the 10-liter jug into the 7-liter jug.
Step 9: Now you have exactly 5 liters of water in the 7-liter jug.
By following these steps, you can measure exactly 5 liters of water using the three given jugs.