maths

posted by Riliwan

A cylindrical tin 8cm in diameter contains water to depth of 4cm.If a cylindrical wooden rod 4cm in diameter and 6cm long is placed in the tin or floats exactly half 2.what is the New depth of water

  1. Reiny

    " ... is placed in the tin or floats exactly half 2.what is the New depth of water "

    Retype in proper English so I can understand it.

  2. Riliwan

    A cylindrical tin 8cm in diameter contains water to depth of
    4cm.If a cylindrical wooden rod 4cm in diameter and 6cm long is
    placed in the tin it floats exactly half submerged.what is the New depth
    of water

  3. Reiny

    volume of wooden rod = π(2^2)(6) = 24π
    volume which is submerged = 12π
    So the volume in the cylinder will change by that amount
    π(4^2)h = 12π
    16h = 12
    h = 12/16 cm = 3/4 cm

    new depth = 4+3/4 cm = 19/4 cm or 4.75 cm

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