Calculate Thickness of Copper Plate | Density and Mass Formula

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To calculate the thickness of a copper plate with a radius of 0.175 m and a mass of 96.1 kg, the density of copper (8.92 x 10^3 kg/m^3) is used. The formula for density, which is mass divided by volume, allows for the determination of volume as 96.1 kg divided by 8.92 x 10^3 kg/m^3. The area of the circular plate is calculated to be 0.0962 m^2, and the thickness can be found by rearranging the volume formula to solve for height, or thickness, as volume divided by area. This method confirms that the thickness can be accurately calculated using the provided mass, density, and area.
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Aflat circular plate of copper has a radius of .175m and a mass of 96.1 kg. What is the thickness of the plate? Answer in units of m.

I know that the density of copper is 8.92(10^3kg/m^3) and the area of the plate is .0962m^2, and i don't see how the thickness is related with the mass. maybe mass/density = volume or something like that
 
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Since you have the area of the plate, think about what volume is for the circular plate. Area of the base X height of the plate. you are trying to solve for the height of the plate.
Density = mass/volume
You are given density and mass, so you can solve for volume. By cancelling unit, you are given a volume in m^3
 
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so your saying its 96.1(mass)/8.92(density)=volume then volume/area gives me my answer?
 
yep i got it right thank you
 

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