You need the surface area of then ends and those are circles so Pixr2 and there are 2 of them. Now you see the sides and that is 2Pirxh. Add these together and you have the surface area of the cylinder.
Surface Area of a Cylinder = 2 pi r2 + 2 pi r h
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T=L+B
Total surface area of a cylinder in square units = (2*pi*radius2)+(2*pi*radius*height)
archimedes
Surface Area = 2(pi r 2) + (2 pi r)* h
The question does not specify what the required formula is for: the volume of an open cylinder, height, radius, surface area, etc. Furthermore, information on the total surface area of a cylinder will not provide sufficient information. A short wide cylinder can have the same surface area as a tall thin one. For example, radius 5 cm and height 4 cm or radius 4 cm and height 7.5 cm or radius 3 cm and height 12 cm or radius 2 cm and height 20.5 cm etc all have the same total surface area. But in each case the value of the other measure, for the open cylinder will be different.