A long capillary tube of radius 0.2mm is placed vertically inside a beaker of waterIf the tube is now pushed into water so that only 5.0 cm of its length is above the surface. Then determine the angle of contact between the liquid and glass surface

A long capillary tube of radius 0.2mm is placed vertically inside a be

1.	A long capillary tube of radius 0.2mm is placed vertically inside a beaker of waterIf the tube is now pushed into water so that only 5.0 cm of its length is above the surface. Then determine the angle of contact between the liquid and glass surface
Answer» `cos^(-1) ""((4)/(5))` `cos^(-1) ""((5)/(7))` `cos^(-1)""((3)/(5))` `cos^(-1)""(5/4)` ANSWER :B