Solve the Problem $V$ Of a Gas Varies Inversely as the Pressure

Multiple Choice

Solve the problem.
-The volume $V$ of a gas varies inversely as the pressure $P$ on it. The volume of a gas is $250 \mathrm{~cm}^{3}$ under a pressure of $18 \mathrm{~kg} / \mathrm{cm}^{2}$ . What will be its volume under a pressure of $36 \mathrm{~kg} / \mathrm{cm}^{2}$ ?

A) $500 \mathrm{~cm}^{3}$
B) $125 \mathrm{~cm}^{3}$
C) $113 \mathrm{~cm}^{3}$
D) $475 \mathrm{~cm}^{3}$