THE EARTH'S BOUNTY 



To find the area of a circle, multiply the 

 square of the diameter by 0.7854. 



To find the cubical contents of a cylinder, 

 multiply the area of the base (floor) by the 

 height. 



Example. A silo 16 feet in diameter and 

 26 feet high is wanted; how many staves, 

 2X6 feet, will be needed, and what will be 

 the feeding area in the silo and its capacity? 



The circumference of a circle 16 feet in 

 diameter is 50.3 feet; there will therefore be 

 required 50.3 -f- % = 101 staves, 2X6 inches, 

 26 feet high, or if staves of this height can- 

 not be obtained, 135 staves 20 feet long, or 

 50 each of 12 and 14 feet long staves. The 

 feeding area will be 16 X 16 X 0.7854 = 201.1 

 square feet, and the cubical content of the 

 silo, 201.1 X 26 = 5,228.6 cubic feet. Esti- 

 mating the weight of a cubic foot of corn 

 silage at 40 pounds, 5,228.6 cubic feet of 

 silage would weigh 209,164 pounds, or about 

 100 tons, which is the approximate capacity 

 of a round silo of the dimensions given. 



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