To Find The Convex Surface Of A Cylinder

Role. - Multiply the circumference by the height or length the product will be the surface.

Example. - The circumference of a cylinders is 0 ft., 4 inches and its length 15 ft., required the convex surface,

6.333 X 15 == 94.995 square feet the surface.

To Find The Solidity Of Cylinders

Ruue. - Multiply the area of the base by the height, and the product is the solidity.

Example. - The base of a cylinder is 18 inches, and the height is 40 inches - what is the solidity ?

182 X .7354 X 40 = 10178.7840 cubic inches.

To Find The Contents In Gallons Of Cylindrical Vessels

Rule. - Take the dimensions in inches and decimal parts of an inch. Square the diameter, multiply it by the height, then multiply the product by .0034 for Wine gallons, or by .002785 for Beer gallons.

Example. - How many U. S. Gallons will a Cylinder contain, whose diameter is 18 inches and length 30 Inches.

182 X 30 = 9720 X .0034 = 33.04, etc., gallons.