The first accurate measurements of the properties of high-pressure gases were made by e. h. amagat in france between 1869 and 1893. before developing the dead-weight gauge, he worked in a mineshaft and used a mercury manometer for measurements of pressure to more than 400 bar. estimate the height of the manometer required.

Height, h = 300.27 meters

Explanation:

Given that,

Pressure of the gas,

We need to find the height of the manometer required. The pressure at a height is given by :

Where

is the density of mercury,

h is the height of the manometer required.

h = 300.27 meters

So, the height of the manometer required is 300.27 meters. Hence, this is the required solution.

think its the third option