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The interior of a typical mesung cup is a right circular cylinder of radius 6 cm. The volume of water we put in the cup is therefore a function of the level h to which the cup is filled. How closely do we have to measure h to measure out one liter of water with an error of no more than 1% (i.e. 10 cm3)?

  • math -

    The cylinder cross section area is
    pi*r^2 = 113.1 cm^2

    The height of a column of liquid containing a volume of 1000 cm^3 is
    h = 1000/113.1 = 8.84 cm

    For a volume measurment accuracy of 1%, the height measurement accuracy must also be 1%, or in this, case 0.09 cm

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