How To Make A Homemade Hockey Slide Board

Mar 11,  · Find the volume of the cylinder using the formula πr²h. Find the surface area of the cylinder using the formula 2πrh + 2πr2. Make a ratio out of the two formulas, i.e. πr 2 h: 2πrh + 2πr 2. Alternatively, simplify it to rh: 2 (h+r). Divide both sides by one of the sides to get the ratio in its simplest form.