Water rises to a height of 30 mm in a capillary tube. If the radius of the capillary tube is made `3//4` of its previous value. The height to which the water will rise in the tube is

Options

A. `(20)/(3) mm`
B. 60 mm
C. `(20)/(9) mm`
D. 180 mm

Answer

A

Explanation

We know that the capillary rises
`h=(2 sigma cos theta)/(pqr) Rightarrow 20xx(1)/(3)=(20)/(3)mm`