The tube of an inclined tube manometer has its upper end open to air and the lower end connected to a vertical cylinder through having a diameter 4 times that of the tube. The slope of the tube is 1 in 4 and specific gravity of manometer liquid is 0.72. The space above the liquid in the through is connected to a gas chamber. When the movement of meniscus in the tube is 8 cm, change in gas pressure, in height of water column, is

The tube of an inclined tube manometer has its upper end open to air a

1.	The tube of an inclined tube manometer has its upper end open to air and the lower end connected to a vertical cylinder through having a diameter 4 times that of the tube. The slope of the tube is 1 in 4 and specific gravity of manometer liquid is 0.72. The space above the liquid in the through is connected to a gas chamber. When the movement of meniscus in the tube is 8 cm, change in gas pressure, in height of water column, is
A.	1.35 cm
B.	1.44 cm
C.	1.80 cm
D.	1.53 cm
Answer» C. 1.80 cm