Solve the following problem:
Q: Three pipes steadily deliver water at 20°C to a large exit pipe in Fig. 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%.
