The pressure of a monoatomic gas increases linearly from $4\times {10}^5\mathrm{N}/{\mathrm{m}}^2\text{ to }8\times {10}^5\mathrm{N}/{\mathrm{m}}^2$when its volume increases from 0.2 m³ to 0.5 m³. The work done by the gas is

• A

  $1.8\times {10}^4\mathrm{J}$

• B

  $4.8\times {10}^5\mathrm{J}$

• C

  $1.8\times {10}^5\mathrm{J}$

• D

  $4.8\times {10}^6\mathrm{J}$