Could someone please help me with this?? I am working on a problem with 2 pipes, one 100mm and one 150mm in diameter. The shape of the pipeline is a square. half is 100mm pipe and the other half is 150mm pipe. 1.If entire pipeline is filled with water, no leak and no supply, is pressure the same through out the pipeline? 2. If no supply, and there is a leak point on the 100mm pipe at a rate of 1 L/min. what formula should I use to calculate the pressure difference?