Water flows at a depth of 0.1m with a velocity of 6m/s in

Water flows at a depth of 0.1m with a velocity of 6m/s in a rectangular channel. The alternate depth is

We find conjugate depth (answer for alternate depth not in options)

Fr₁ =	V₁	=	6	= 6.06
	√gy₁		√9.81 × 0.1

y_z =	y₁	[− 1 +√1 + 8Fr₁²]
	2

=	0.1	[− 1 +√1 + 8 ×(6.06)²]
	2

= 0.81 m