An incompressible fluid with density = 1000 kg/m3 travels through a channel with a rectangular cross-section

 An incompressible fluid with density ρ = 1000 kg/m3 travels through a channel with a rectangular cross-section of dimensions 25 mm by 30 mm. The average velocity of the flow in this portion of the channel is 1 m/s. If the flow is at a steady state, what will the velocity be if the rectangular cross-section increases to 50 mm by 50 mm? Start from the integral form of the continuity equation.