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What does this mean?

  1. Apr 30, 2009 #1
    what does cross sectional area mean?

    A hydraulic lift has two connected pistons with cross-sectional areas 5 cm2 and 650 cm2. It is filled with oil of density 720 kg/m3.

    Is it the diameter? I dont know
  2. jcsd
  3. Apr 30, 2009 #2
    The cross sectional area in this case is the same as the area of a circle


    Cross-sectional area means pretty much what it says, the area of a cross-section of the item. In this case a piston. So if you think about a section of a piston and look at it head on, its just a circle.
  4. Apr 30, 2009 #3
    ok thanks
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