Answer:
![h=305.8103\ m](https://img.qammunity.org/2021/formulas/physics/college/1vv65ujde9175v4ihnay1j1celyw38zz3q.png)
Step-by-step explanation:
Given:
- gauge pressure desired,
![P_g=3* 10^5\ Pa](https://img.qammunity.org/2021/formulas/physics/college/ekso204a2bwme7iwp84vkuzns0496hbii2.png)
As we know that the layers of the liquid column exert pressure due to their weight which is given as:
![P=\rho.g.h](https://img.qammunity.org/2021/formulas/physics/high-school/elg8vl678m4itdp14xtuc8zjuebk8usplv.png)
where:
pressure due to liquid column
density of the liquid
for water
acceleration due to gravity
height of the liquid column
Similarly:
![P_g=\rho.g.h](https://img.qammunity.org/2021/formulas/physics/college/thp4eihwrcv9ss5z5fvkzyj2aetmd4sbeo.png)
![3* 10^(6)=1000* 9.81* h](https://img.qammunity.org/2021/formulas/physics/college/40rj5tn7l2evyfy2zoyswc048znq2xc4sz.png)
![h=305.8103\ m](https://img.qammunity.org/2021/formulas/physics/college/1vv65ujde9175v4ihnay1j1celyw38zz3q.png)