MISCELLANEOUS PROBLEMS. 249 



39. If 14 tons of silage is grown to an acre, how many 

 acres will be necessary to grow the supply required for 

 this 10-cow herd? 



40. It is advisable to feed not less than 2 inches of 

 silage out of the silo each day to insure that it does not 

 spoil on top. If a minimum of 300 pounds is fed a day, 

 what should be the diameter in feet of the silo? 



41. A neighbor desires to build a silo? He has 40 

 cows in his herd. At times he expects to feed as little 

 as 800 pounds of silage a day. What should be the 

 diameter in feet of his silo ? 



42. He expects to feed his cows for 240 days, averag- 

 ing for this period 35 pounds of silage a day for each 

 of the 40 cows in his herd. With the diameter selected 

 in Problem 41, what height of silo will be required in 

 order to .store the full amount of silage wanted ? 



43. How many staves will be required for a round 

 silo that is to be 16 feet in diameter and 34 feet high, the 

 staves being 6 inches wide and 2 inches thick ? 



44. How many staves and how much lumber will be 

 required to build the silo of the dimensions called for in 

 Problem 42, the staves being 3 inches thick and 8 inches 

 wide? 



45. The farm under discussion contains 75 acres 

 in the form of a square. What is the length of each of 

 the four sides? The diagonal? 



46. A neighbor's farm contains 80 acres, rectangular 

 in shape. The length is just twice the width. What is 

 the length of the side? Of the end? 



47. On this- farm is a circular cistern 7 feet in diam- 

 eter and 7 feet deep. How many gallons will it hold 

 when full? 



