Q$.4$

A pismatic tank $($width $w=3m$ into the paper$)$ is floating in hydrostatic water. A circular opening on the bottom wall of the tank is plugged by conical volume to prevent water entering the tank.

a$)$ Determine the air pressure in the tank to keep the circular hole plugged. Ignore weight of the come.

b$)$ Calculate the total weight of the tank and conical volume combination.

Given: $d_1=3m,d_2=4m,h=2m,R=1m,b=3m,{}_w=9810\frac{N}{m^3}$