194 THE QUANTITY DISCHARGED FROM PIPES. 



EXAMPLE. 



The length of a water-pipe is 5780 feet, the head of water 

 is 170 feet, and the diameter of the pipe is 6 inches. Re- 

 quired the velocity of discharge. 



By (6), we have 



/: 



" V 



2380 x 170 x .5 



5780 



5780 + 54 x .5 12 (5780 + 54 x .5) 

 By (8), we have 



= 5.81. 



2380 x 170 



5780 ' 



By (8) of Art. 104, we have 



_ __ _ 

 12 = 



v = 47. 9A/^ 



170 x. 5 



5780 + 54 x .5 

 By (9) of Art. 104, we have 



v - 47.9A/ 



5780 



= 5.8 feet, nearly. 



= 5.8. 



It will be observed that these results are very nearly the 

 same. 



IOC. The Quantity Discharged from Pipes. Let 



Q be the number of cubic feet discharged per second; then 

 Q is given by the formula, 



