The pressure of a gas p(v) varies inversely with the volume of the gas v. The pressure of a gas measures 15kg/cm² when its volume is
300cm³.
Which equation can be used to find the pressure of the gas when the volume is changed?

A. p(v)=4500v
B. p(v)= 20/v
C. p(v)=20v
D. p(v)= 4500/v