There are two process `ABC` and `DEF`. In which of the process is the amount of work done by the gas is greater ?

Options

A. ABC
B. DEF
C. Equal in both process
D. it cannot be predicted

Answer

B

Explanation

b. `W_(ABC) = (pi r^(2))/(2) = (pi (6)^(2))/(2) = 18 pi`
`W_(DEF) = (pi xx 3^(2))/(2) + (pi xx 3^(2))/(4) + (15 - 12) xx 18`
` = 6.75 pi + 54`
`W_(DEF) gt W_(ABC)`