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    danyzavala's Avatar
    danyzavala Posts: 5, Reputation: 1
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    #1

    May 18, 2009, 02:45 PM
    What is the radius of sphere?
    Consider a concrete sphere of mass 50 kg. Find its radius.
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
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    #2

    May 18, 2009, 02:54 PM

    You need the density of concrete.

    density of concrete = approximately 2400 kg/m3 (145 lbs/ft3)



    The volume is found from the radius:



    Plug in the volume, solve for r.
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