By sucking a straw a student can reduce the pressure in his lungs to `750 mm` of `Hg ("density")= 13.6 kg//cm^(3))` Using the straw, he can drink water from a glass up to a maximum depth of :

Options

A. 10 cm
B. 75 cm
C. `13.6` cm
D. `1.36 cm`

Answer

C

Explanation

Pressure difference between lungs and atmosphere =760 mm-750 mm =10 mm 1 cm of Hg.
Pressuire difference `=1xx13.6xxg=lxxlxxg ` of water.
i.e. one can drawn a depth of `13.6` cm of water