How Does Pipe Expansion Affect Water Pressure?

[omgitsmonica]

Homework Statement

Water flows at 6.1 m/s in a horizontal pipe with a pressure of 3 ´ 104 N/m2. If the pipe widens to twice its original radius, what is the pressure in the wider section? Give answer in Pascals.

Homework Equations

volume = length x area
rate = volume / time
rate = volume x area

The Attempt at a Solution

Again, my professor's equations leave a bit to be desired. If anyone has a better equation (or is willing to help me solve this problem) please let me know. Sorry to post twice in a row!

 

[noumed]

Since the question is asking for Pressure, try to find an equation that includes Pressure. Also, give this a thought, would the pressure increase or decrease if the area increases?