Arman G. answered • 12/24/19

Aerospace Engineer

bernoulli's principle does not require water to be the same velocity on both ends:

rho*g*h + .5*rho*v^{2} initial = rho*g*h + .5*rho*v^{2} final and initially velocity is zero so it cancels out on left side of equation.

For time use the formula that A1V1=A2V2 from cons. of mass. Note that A1V1 is Area*distance/time and the distance its moving is downward so the base area times the height it moves through over time so it's really volume/time so volume flow rate so set the volume/time = A2V2