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## Homework Statement

A horizontal water main with a cross-sectional area of 184 cm2 necks down to a pipe of area 45.0 cm2. Meters mounted in the flow on each side of the transition coupling show a change in gauge pressure of 70.0 kPa. Determine the flow rate through the system, taking the fluid to be ideal.

## Homework Equations

p+(1/2)rho*v^2+rho*gy

## The Attempt at a Solution

I'm confused about how to do this problem without any velocity given. Thank-you!!