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if iron weighs 0.25lbs. per cubic inch, an iron bar 8'6" by 4" by 1/2" weighs?

  • math -

    8' 6" = 102 inches

    V = 102 * 4 * (1/2)

    V = 204 cu. in.

    204 * 0.25 = _____ weight of iron bar

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