applying bernouli's theoram for water flow thru' the 2 surfaces S₁ and S₂.......

P₁+ hdg  + 1/2dv₁² = P₂+ hdg  + 1/2dv₂²............where h= the height from the, the two surfaces are located....

P₁=P + H₁dg........and P₂=P + H₂dg.......P=atmospheric pressure...

applying we have dH g = 1/2(v₂²-v₁²)

but we have from eqn. of continuity S₁v₁=S₂v₂

applying this we have SV =

rate if useful......