Which of the following floats on water surface and has roots deep under water?

Q. A layer of benzene $(\mu =1.50)6cm$ deep floats on water ( $\mu =\frac{4}{3})4cm$ deep. When viewed vertically through air, the apparent distance of the bottom of the vessel below the free surface of the benzene is

Q. The pine tree has a root system to be able to absorb water from deep under the ground.

Q. A layer of benzene $({\mu }_1=1.5)6\text{cm}$ deep floats on water $({\mu }_2=1.3)4\text{cm}$ deep. When viewed vertically through air the apparent distance of the bottom of the vessel below the surface of the benzene will be -

Q. A straw $6cm$ long floats on water. The water film on one side has surface tension of $50dyn/cm$. On the other slide, camphor reduces the surface tension to $40dyn/cm$. The resultant force acting on the straw is