Doubt about "venturi meter" question

[math132003]

Homework Statement

Using Bernoulli’s equation for
steady incompressible flow with no losses,
show that the flow rate Q is related to the
manometer reading h by:

Relevant Equations

Bernoulli

fig
equations that I used:

Δz = 0

=

and I got the following result (which is the same in the book's solution book):

but in my test I can only choose one of these:

I would like to know if there is a mistake by my teacher or if it is possible to obtain one of these multiple choice alternatives.

Thanks!

 

[TSny]

I agree with your answer. None of the choices can be made to agree with your answer. So, you might ask your teacher about it. In the choices, maybe the teacher meant to write $A_2/A_1$ instead of $D_2/D_1$, or write $A_1/A_2$ intstead of $D_1/D_2.$