SOLUTION: you are running water into the laundry sink to get a mixture that is one half cold water and one half hot water the hot water is slow it runs at a rate of 7.8 liters per minute so

Question 322533: you are running water into the laundry sink to get a mixture that is one half cold water and one half hot water the hot water is slow it runs at a rate of 7.8 liters per minute so you turn it on first. 2 minutes later you turn on the cold water witch runs at a rate of 12.3 liters per minute. At wat time should you turn the two faucets off?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
you are running water into the laundry sink to get a mixture that is one half cold water and one half hot water the hot water is slow; it runs at a rate of 7.8 liters per minute so you turn it on first.
2 minutes later you turn on the cold water whitch runs at a rate of 12.3 liters per minute. At wat time should you turn the two faucets off?
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Equation:
1st 2 minutes: 2*7.8 = 15.6 liters of hot water
----
Next "x" minutes: 12.3x liters of cold water + 7.8x liters of hot water.
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Equation to get same amount of hot and cold water:
hot = cold
15.6 + 7.8x = 12.3x
---
4.5x = 15.6
---
x = 3.47 minutes
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Cheers,
Stan H.
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