please use
a=7 , b=2
Extracted text: 1- Two pipes merge into a single pipe. Before the flow is fully-developed, the velocity profile is as indicated in the figure. Find V. DıF1,a (m) 2V0,4a (m) Vi=2,a (m/sn) 0,4a (m) 0.4a (m) Dy=1,2+3x0,0a (m) 0,4a (m). 2V 0,4a (m) Vi-3,b (m/sn) D2=0,8b (m) 0,4a (m) V2