Problem 3 Three pipes steadily deliver water to a large exit pipe. The velocity V2=5m/s, and the exit flow rate Q4-120m³/hr. Find (a) V₁; (b) V3; and (c) V4 if it is known that increasing Q3 by 20% would increase Q4 by 10%. D₂ = 5 cm D3 = 6 cm D₁ = 4 cm D₁ = 9 cm