Question 1197402
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The water level in a graduated cylinder stands at 31.0 mL before 
and at 38.2 mL after a 20.54g metal bolt is submerged in the water.
What is the volume of the bolt?
What is the density of the bolt?
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The volume of the bolt is the difference of occupied volumes after and before submerging

    volume of the bolt = 38.2 - 31.0 = 7.2 cubic centimeters.


The density of the bolt is the ratio {{{mass/volume}}} = {{{20.54/7.2}}} = 2.85 g/cm^3.
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Solved.