Three pipes steadily deliver water at 20°C to a large exit pipe in Fig. P3.8The velocity V2 = 5 m/s, and the exit flow rate Q4 = 120 m3/h. Find (a) V1;(b) V3; and (c) V4 if it is known that...

Three pipes steadily deliver water at 20°C to a large exit pipe in Fig. P3.8 The velocity V2 = 5 m/s, and the exit flow rate Q4 = 120 m3/h. Find (a) V1; (b) V3; and (c) V4 if it is known that increasing Q3 by 20% would increase Q4 by 10%.