AP EAMCET Engineering 2013 Solved Paper

Three moles of an ideal monoatomic gas undergoes a cyclic process as shown in the figure. The temperature of the gas in different states marked as 1, 2, 3 and 4 are 400 K, 700 K, 2500 K and 1100 K respectively. The work done by the gas during the process 1-2-3-4-1 is (universal gas constant is R)