1) The document presents a fluid mechanics problem involving the calculation of the volumetric flow rate of kerosene flowing through a pipe system. 2) The pipe system consists of 30 meters of copper pipe with two 90-degree elbows, connecting a tank A (at 150 kPa pressure) to tank B. 3) An iterative method is used to calculate the average flow velocity based on equations for pressure loss due to friction and fittings, and Bernoulli's equation. 4) The final calculated volumetric flow rate is approximately 493 liters per minute.