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Fluid mechanics -Mass related

  1. Jan 21, 2010 #1
    1. The problem statement, all variables and given/known data

    A solid block of stone with a relative density of 4 is broken down and crushed into an average size of 20mm. if the stone originally had a volume of 50 m cubed, how many truck loads with a volume of 2 m cubed will it take to transport the crushed stone if 25L of the crushed stone has a mass of 80 kg.
    Answer[32 trucks]

    2. Relevant equations

    not sure how to take the 20mm and work the density.

    3. The attempt at a solution

    density of 25L of stone = 3200 kg/m3
    Some how i always get an answer of 25 trucks
    Tried working out the average volume of the 20mm crushed stone. then saw how many of the stone can full one truck, still i get 25 tuck loads,,,,,?
  2. jcsd
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