A pipeline conveys benzene irom one point to the other. A gauge attached to line reads 150 kPa. It is desired to check the gauge reading with benzene-over-mercury U-tube manometer. Determine the expected height difference of the mercury in the manometer; if on one end the manometer is open to the atmosphere and on the other end where the gauge pressure is connected there is a 3cm height of benzene above the mercury meniscus. (benzene density is 876kg/m3 and mercury 13600kg/m3 )