How to Calculate Pressure Difference in Aorta with Ideal Fluid Model

[Rron]

Homework Statement

An aneurysm is an abnormal enlargement of a blood vessel such as the aorta.
Suppose that, because of an aneurysm, the cross-sectional area A1 of the aorta
increases to a value A2 = 1,7A1. The speed of blood, with average density of
1060 kg/m3, through a normal portion of the aorta is v1 = 0,40 m/s, and through
the enlarged region is v2 = 0,24 m/s. Using the model of an ideal fluid and
assuming that aorta is horizontal (the person is lying down), determine the
amount by which the pressure P2 in the enlarged region exceeds the pressure
P1 in the normal region!

Homework Equations

a1v1=a2v2
a=surface
v=velocity

The Attempt at a Solution

The only thing is how to get an equation for pressure from this a1v1=a2v2
I guess

 

[tiny-tim]

Hi Rron!

You need Bernoulli's equation ​