192 



FARM ARITHMETIC. 



687. For a herd of 30 cows, how many square feet of 

 feed surface are required in the silo? 



688. What is the diameter of the round silo, that pro- 

 vides a horizontal feeding surface of 5 square feet daily 

 for 25 cows? 



Process : 25 X 5 

 required. 



V 159.15 



= 125 square feet area of feeding surface 



125 -f- .7854 = 159.15 



12.6 Diameter of silo. 



Dairy Herd and Barns. 



Note the silo in the center. The silo is indispensable if dairy products are to be 

 secured at the greatest economy. 



689. What diameter of silo is required for a herd of 

 20 cows, each cow to have 5 square feet of feeding space? 



690. What diameter of silo is required for a herd of 

 30 cows when a feeding surface of 5 square feet is given 

 each cow? 



691. For a herd of 35 cows? Fifty cows? 

 Quantity of silage needed. In planning a silo the 



