Solve for Mass and Density of a Floating Cylinder in Fresh Water

[series111]

Homework Statement

A solid cylinder 350mm in diametre and of total length 750mm floats upright in fresh water to a depth of 500mm determine (a) the mass of the cylinder.(b)the density of the material in the cylinder.

Homework Equations

mg=pgha

The Attempt at a Solution

area= lxd = 0.75x0.35=0.262m

m=pfa as the gravity cancels out m = 1000x0.5x0.262=131kg


it is question b i am struggling with as i have tried rearranging the formula for annother question which i have the answers for and i cannot get the same answer please help!

 

[rohanprabhu]

since you have the mass of the cylinder.. density is simply mass divided by the volume..

 

[series111]

thanks very much mark