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GRE - Quantitative Reasoning - Word Problems

During an experiment, the pressure of a fixed mass of gas increased from 40 pounds per square inch (psi) to 50 psi. Throughout the experiment, the pressure, P psi, and the volume, V cubic inches, of the gas varied in such a way that the value of the produ

During an experiment, the pressure of a fixed mass of gas increased from 40 pounds per square inch (psi) to 50 psi. Throughout the experiment, the pressure, P psi, and the volume, V cubic inches, of the gas varied in such a way that the value of the product PV was constant.

Quantity A - The volume of the gas when the pressure was 40 psi

Quantity B - 1.2 times the volume of the gas when pressure was 50 psi

 

A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.

Given that PV is constant

i.e. P1V1 = P2V2

40*V1 = 50V2

V1 = 1.25V2

Thus 1.2V2 < V1

Quantity A is greater