A fluid of unknown density is used in two manometers. One is sealed-end (with the other end open to the atmosphere) and the other is inserted across an orifice in a water pipeline. The readings are determined on a day when the barometric pressure is 756 mmHg. If the reading on the sealed-end manometer is 7.23 m and the reading on the orifice manometer is 26 cm, what is the pressure drop in the pipeline at the locations where the manometer attaches to the pipe?
