Problem $2$

Chlorine gas containing $2\mathrm{.}4$ percent $O_2$ is flowing through an earthenware pipe. The gas flow rate is measured by introducing air into it at the rate of $115\frac{m^3}{m}in.$ Further down the line, after mixing is complete, the gas is found to contain $10\mathrm{.}85$ percent $O_2.$

Determine the cubic meters of the initial gas flowing per minute through the pipe.