1. The problem statement, all variables and given/known data Water flows through a 1.5 [in] diameter pipe. In a 1.5 [ft] section of the pipe water is injected through the porous walls into the pipe at a velocity of 3 [in/s]. What is the average velocity at the exit if the inlet velocity is 6 [ft/s]? 2. Relevant equations 3. The attempt at a solution I used 62.4 lb/ft3 for the density of water. I calculated the area of the pipe to be A=πR2=0.01227 ft3 m1=ρAv=(62.4)(0.01227)(6)=4.59 lb/s Aw=DL=(1.5/12)(1.5)=0.1875 ft^2 I'm not super confident that this area is correct... mw=ρAwvw=(62.4)(0.1875)(3/12)=2.925 lb/s Then I used the conservation of mass... m1+mw=m2 (4.59)+(2.925)=m2 m2=7.25 lb/s Now just plug into formula to get vout vout=(m2)/(ρA)=(7.52)/(62.4*0.01227) vout=9.82 ft/s Which is wrong.... My options are 7 ft/s, 18 ft/s, 28 ft/s, and 150 ft/s. I'm not sure what I did wrong!