The discharge in m3 / s for laminar flow through a pipe

The discharge in m³ / s for laminar flow through a pipe of diameter 0.04 m having a centre line velocity of 1.5 m/s is

u_max = 2 u_avg
u_max = 2 u_avg
1.5 = 2u_avg

u_avg =	1.5	m /s
	2

Q = A × V = A × u_avg

Q =	π	d² × u_avg
	4

=	π	× (0.04)² ×	1.5	=	3π	m³ /s
	4		2		10000

	3π
	2500

	3π
	5000