===Calculating Vessel Capacity in Volume and Time===

Calculates the **total amount** of liquid remaining in a square/rectangular tank, and the **amount of time it will last** given the current level and outlet flow speed.

<code Python>

@mdl.part("Water Tank",host)
def WaterTankCapacity(mod):
    Fill = mod.AddInput("Level",0,"Main Water Tank.Level")
    Speed = mod.AddInput("Speed",0,"Main Water Pump.Flow Rate")

    Width = mod.AddConstant("Width",5)
    Length = mod.AddConstant("Length",5)
    Height = mod.AddConstant("Effective Height",6)

    #The total capacity of the tank in litres
    MaxCapacity = mod.AddOutput("Maximum Capacity",lambda: float(Width) * float(Length) * float(Height),[Width,Length,Height])

    #The total amount actually in the tank
    CurrentlyHolding = mod.AddOutput("Current Volume",lambda: float(MaxCapacity) * (float(Fill)/100),[Fill,MaxCapacity])

    #The time remaining, given the flow
    mod.AddOutput("Time Remaining",lambda: float(CurrentlyHolding) / float(Speed),[CurrentlyHolding,Speed])

</code>