Answer
18.2 atm
Work Step by Step
Firstly, we convert cm$^{2}$ to m$^{2}$
1 cm$^{2}$ = 1$\times10^{-4}$ m$^{2}$
125cm$^{2}$ = 0.0125m$^{2}$
Secondly, We find the pressure in Pascals using the following equation: Pressure=$\frac{Force}{Area}$
Pressure=$\frac{2.31\times10^{4}N}{0.0125m^{2}}$
= 1848000 Pa
In the last step we convert Pascal into atm
1 atm= 101325 Pa
$\frac{1848000}{101325}$ = 18.2 atm
