A U-tube differential mercury manometer is connected between two pipes X and Y. Pipe X contains a fluid (Sp.gr. = 1.59) under a pressure of 103 kN/m and pipe Y contains oil (Sp.gr. = 0.8) under a pressure of 172 kN/m Pipe X is 2.5 m above pipe Y. The mercury level in the limb connected to pipe X is 1.5 m below the centreline of pipe Y. The level of mercury in the limb connected to pipe Y is below the level of mercury (Sp.gr. = 13.6) in the other limb. Find the manometer reading in centimetres of mercury and show the same as a schematic diagram.