Acylindrical can of cat food has a diameter of 3.5 inches and a height of 1.25 inches a second brand of cat food is packaged in a cylindrical can with a radius of 1.2 inches and a height of 1.25 inches what is the difference between the volumes of the cans show your work

So..Volume of a cylinder = pi(r)^2 x Height
The first can has a radius of 1.75 (3.5/2) and a height of 1.25 inches..put that in the formula and you'll get the volume of the first cylinder ~ 12.02 
Do the same thing with the second cylinder and you'll get ~5.65 as the volume. 
Now calculate the difference between the two by simply subtracting the two volumes and the difference would  approximately be 6.37 
hope this helps! :)