1. The problem statement, all variables and given/known data Describe how a venturi device for measuring the flow of water in a pope works and estimate the slowest flow rate such a device could be expected to measure using 20% of cross sectional area constriction and a mercury manometer. 2. Relevant equations A1V1=A2V2 I also know how to find the pressure 3. The attempt at a solution I am not sure how to find the "slowest rate" in this question. This question is one of my past year exam questions and i am studying for my exam in 6 days. so if someone can guide me on how to make a start that would be great.