physics

an iron bar measures 11 cm x 7 cm x 5 cm it is melted down to make a cylinder height of 9 cm what is its radius

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  1. 11 x 7 x 5 cm^3 = pi*R^2*9

    Solve for R

    R = sqrt[385/(9*pi)] cm

    You do the numbers

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    posted by drwls

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