Is There an Error in My Bernoulli and Waterflow Homework Solution?

[lurifax1]

Homework Statement

http://imgur.com/rhaQabj
radius of watertank = 5.5cm

Homework Equations

https://en.wikipedia.org/wiki/Bernoulli's_principle
https://en.wikipedia.org/wiki/Darcy–Weisbach_equation

The Attempt at a Solution

I've tried to put up to equations on the form:
134=k*sqrt(x+0.6), 75=k*sqrt(x+0.3).

Where k is the constant and x is the height from the bottom of the tank to the exit of the pipe.
I think something must be wrong in my assumptions since I get different k values for the two situations

 

[SteamKing]

Homework Statement

http://imgur.com/rhaQabj
radius of watertank = 5.5cm

Homework Equations

https://en.wikipedia.org/wiki/Bernoulli's_principle
https://en.wikipedia.org/wiki/Darcy–Weisbach_equation

The Attempt at a Solution

I've tried to put up to equations on the form:
134=k*sqrt(x+0.6), 75=k*sqrt(x+0.3).

Where k is the constant and x is the height from the bottom of the tank to the exit of the pipe.
I think something must be wrong in my assumptions since I get different k values for the two situations

Is there a question here?

Simply posting a diagram is insufficient. This is Physics Forums, not Psychics Forums.

 

[lurifax1]

I'm sorry for not being clear. I want to find a function for the waterflow out from the tank depending on the height of the tank. I've already measured the flow out from two different heights. I was wondering if I should try to find a mathematical expression for it based on these two values, or simply find more measurements and linearize it.

 

[haruspex]

Where k is the constant and x is the height from the bottom of the tank to the exit of the pipe.
I think something must be wrong in my assumptions since I get different k values for the two situations

Please post your working. You have two independent linear equations with two unknowns (x, k²), so it would be very strange if there is no consistent solution.