An ideal gas is subjected to cyclic process involving four thermodynamic states, the amounts of heat (Q) and work (W) involved in each of these states are
`Q_(1)= 6000 J` ,`Q_(2)= -5500 J,` `Q_(3) = -3000 J,``Q_(4) =3500 J`
`W_(1) = 2500 J, ``W_(2) = -1000 J,``W_(3) =-1200 J:``W_(4) = x J `
The ratio of the net work done by the gas to the total heat absorbed the gas is `eta `. The values of `x` and `eta` respectively are

Options

A. 500 , 7.5%
B. 700 , 10.5%
C. 1000 , 21%
D. 1500 , 15%

Answer

B