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Homework Help: Fluids physics problem

  1. Jan 29, 2008 #1
    1. The problem statement, all variables and given/known data
    A solid cylinder 350mm in diametre and of total length 750mm floats upright in fresh water to a depth of 500mm determine (a) the mass of the cylinder.(b)the density of the material in the cylinder.

    2. Relevant equations

    3. The attempt at a solution

    area= lxd = 0.75x0.35=0.262m

    m=pfa as the gravity cancels out m = 1000x0.5x0.262=131kg

    it is question b i am struggling with as i have tried rearranging the formula for annother question which i have the answers for and i cannot get the same answer please help!
  2. jcsd
  3. Jan 29, 2008 #2
    since you have the mass of the cylinder.. density is simply mass divided by the volume..
  4. Jan 29, 2008 #3
    thanks very much mark
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