Jenna's new dodge ram 2500's tires are at 300 kpa and 30 l of air, but after going to the service station the tires have 42l of air. what is the new tire pressure? kpa

New tire pressure = 214.286 kPa

According to Boyle's Law the volume of a fixed mass of a gas is inversely proportional to pressure at constant temperature.

P α V, and PV = Constant

Therefore;

P1V1 = P2V2, where P1 is the initial pressure, V1 is the initial volume , P2 is the new pressure and V2 is the new volume.

P2 = P1V1/V2

     = (300 kPa × 30 L)/ 42 L

      =  214.286 kPa