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Water Storage for the Smallsville

by Jason Chamberlain

Water Storage for the Smallsville

Act One

  • Jason Chamberlain

    Jason Chamberlain

    October 09, 2014

    How many people can subsist on this water for 30 days?

  • 1.

    How many gallons of water are in our new tank?

Act Two

  • ImageA Closer Look
  • 1 cubic foot = 7.48 gallons

  • The metal tank sits on a 12-inch tall concrete foundation.

  • Teacher note
    Yes, there is a reason for the zoomed-in picture of the Porta-Potty. Think scale factor. Porta-Potties have a standard size, and don't forget that it's sitting on the dirt. My school site has 2 Porta-Potties on it for game days, so students were able to recognize that they could go on a field trip to the Porta-Potty. There's a first time for everything! If not, research is always good.

Act Three

  • FileWater Tank Measurements
  • Teacher note
    With the given measurements, have students recalculate the volume of the tank and how many gallons it will hold. Then, have them compare it to their original estimate. In this 3-dimensional problem, precision makes a big difference in the students' estimates. Remember, we are looking for problem solvers. Estimation is a huge part of real life. Celebrate "close" answers.


  • 2.

    How long will it take the water to reach your house?

  • 3.

    How many conical water cups can be filled from this tank, in scientific notation?

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