EXERCISE 7. To CALCULATE THE AMOUNT OF HAY IN A STACK 



RULE: Multiply the width of the stack in feet by the "over" (i. e., the 

 distance from the base of the stack on one side over the top to the base on 

 the other), divide the product by 4, and multiply the quotient by the length. 

 This gives the contents of the stack in cubic feet; for hay that has stood less 

 than 30 days, divide by 512; 30 to 60 days, by 422; over 60 days, by 380. 

 The quotient gives the tonnage of the stack. 



Example: A two-months old stack is 30 feet wide by 40 feet "over," 

 and 75 feet long. How many tons of hay does it contain? 



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