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Your father sends tou to the creek to get 7 gaf water. You have a 3 gallin can, and a 5 gallon can. How do tou come away with 7 agllons?

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Fill the five-gallon can from the creek. Pour three gallons into the three-gallon can, leaving two gallons in the five-gallon can. Empty the three-gallon can, then pour the two gallons from the five-gallon can into the three-gallon can. Fill the five-gallon can from the creek. You now have two gallons in the three-gallon can and five gallons in the five-gallon can for a total of seven gallons.

Posted on Nov 21, 2014

  • Sharon Brodbeck
    Sharon Brodbeck Nov 22, 2014

    Thanks so much.. it was a riddle my Algebra Professor gave us for extra credit.

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You need to get 7 gallins of water, you have a 3 gallon can and a 5 gallon can. How do u get 7 gallons?


Fill the five-gallon can from the creek. Pour three gallons into the three-gallon can, leaving two gallons in the five-gallon can. Empty the three-gallon can, then pour the two gallons from the five-gallon can into the three-gallon can. Fill the five-gallon can from the creek. You now have two gallons in the three-gallon can and five gallons in the five-gallon can for a total of seven gallons.

Nov 21, 2014 | Water Heaters

1 Answer

Is a 80 gallon hot water heater legal for a 7 apt. building?


You probably need commercial 150gallon gas water heater.
Or three 80 gallon tanks, depending on number of people.

80 gallon residential gas heater is rated for low-demand 6-8 person household.
80 gallon residential electric is rated for low-demand 5 person household

80 gallon is not correct for 14-28 people in 7 apartments
http://waterheatertimer.org/Whatsize2.html
http://waterheatertimer.org/Two-water-heaters.html

Call local plumber, or local code department.

Apr 10, 2013 | Water Heaters

2 Answers

My family is moving in...how do i increase hot water availability?


large water heater, turn p the themo stat to a higher setting ( watch for burns with young childern and older folks)

or the best install a tempering valve. this valve mixs hot water with cold water before it goes into the building.

Again if you have young ones or old people they can burn faster than any other group.the best is a larger heater for the DIY person.

Thanks Tom

Sep 13, 2011 | Rheem Water Heaters

1 Answer

It si 7 years old an leaking inside the unit on top of the burners


Tank is rusted out, and requires replacement.

I) To protect yourself from ruptured tank, you should turn it off and use it only when hot water is needed.
http://waterheatertimer.org/Emergency-steps-for-leaking-water-heater.html

II) How to install ordinary tank-type water heater yourself:
http://waterheatertimer.org/How-to-install-gas-water-heater.html

III) There are 5 preventable things that kill a water heater and cause it to rust away.

1) Anode rod depletion.
Loosen anode rod before installing water heater.
http://waterheatertimer.org/Replace-anode-rod.html

2) Stray current corrosion
http://waterheatertimer.org/9-ways to save-with-water-heater.html#Ground-tank

3) Sediment build up because no water softener
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html

4) Corrosive effects of water softener, and anode rod not inspected (see #1 above)

5) Chemicals stored in same room as gas appliance.
Read page 2 of manual below
http://waterheatertimer.org/pdf/Service-manual-for-ignition-resistant.pdf

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you via e-mail while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Feb 21, 2011 | Rheem Tank Water Heater G100-200, 100...

1 Answer

Energy smart hot water heater not giving ample amount of hot water both elements ohm at 12.5


element-connection-450.jpg
For images and product information
For manual


You checked ohms, did you check for 240V across lower element when lower element is turned on?

Energy smart electric water heater
has a control box on top of unit. Water heater does not have typical thermostats that can be tested and replaced. Temperature sensors located above each element send information to control box through small black and red wires. Temperature sensor sells for about $40, but there is no test listed that shows how to determine when sensors fail.

Potential problems:
-Temperature sensor is not reading correct temp
-Control box not processing correct temperature information
-Selector on control box set to 2, 3 or 4
-Thermostat temp on control box set lower than 120 degrees F
-Sediment build-up starting to surround lower element so water doesn't circulate (see if drain valve runs full-open

Oct 08, 2010 | Water Heaters

1 Answer

This on demand hot water heater works ok but it sends a gallon of cold water through it before the hot water starts. Is there a way to tweak it so it starts heating the water right away?


feel the pipes coming from the water while you turn the hot water on. It does come out hot, but it has to push the cold water through the lines first (the water that has been sitting in the pipe)

Dec 05, 2009 | Bosch Water Heaters AquaStar 250SXO...

1 Answer

What is proper vent size for my hot water heater


go to 4 better to big than finding 3 was to small

Nov 19, 2009 | Water Heaters

1 Answer

Code LC, I cleaned the filter, won't stop beeping


you need to flush out the rinnai. to do this you will need 4 gallons of white viniger & a circulating pump. #1 disconnect the power. #2 close both incoming & outgoing water valves under the unit. #3 conect a drain hose to the out going flush valve ( flush valves are under the unit & have brass caps) #4 connect pump outlet hose to ingoing flush valve. #5 put pump incoming hose & drain hose from outgoing flush valve in a 5 gallon bucket. #6 pour 4 gallons of vinager into the bucket. #7 open both flush valves. #8 turn on the circulating pump & let viniger pump in the incoming flush valve through the rinnai & out the outgoing flush valve back into the bucket for 45 min. #9 disconct pump from incoming side & close incoming flush valve.( don,t close outgoing vaves at this time) #10 put out going hose in empty bucket. #11 open incoming water to flush viniger out of unit. # 12 disconct outgoing hose , close outgoing flush valve & open outgoing water valve. #13 clean filter & turn on power.

Jul 08, 2009 | Rinnai Water Heaters

1 Answer

Water temperature


if it is electric remove the metal plate that is about 1/3 from the top usually colored blue or whitethere is pull dome of the insulation out fof the way you will see red and blue wires going into the element and a plastic cover underneath the cover is a setting with an indicator it is usually adjustable with a thin flat head crew driver the indicator has high medium and low temp setting

Just turn indicator to temp desired


good luck




Jan 08, 2009 | Rheem 40 Gallon FVR NATGAS Low WATER...

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