A perfect gas is compressed under conditions of constant temperature to a volume of 30 m³. If the final pressure of the gas is 450 kPa gauge and the initial volume was 135 m³, what was the initial pressure? (Assume atmospheric pressure to be 101.3 kPa)
A. 122.5 kPa gauge
B. 21.2 kPa gauge
C. 223.8 kPa gauge
D. 101.3 kPa gauge
E. 124.8 kPa gauge
Answer: B