Answer:
,

Step-by-step explanation:
The ideal efficiency of the Diesel cycle is given by this expression:
![\eta_(th) = \left\{1 - (1)/(r^(k-1)) \cdot \left[(r_(c)^(k)-1)/(k\cdot (r_(c)-1)) \right]\right\}* 100\%](https://img.qammunity.org/2021/formulas/engineering/college/fn2nuphl8uqji634vv47x2fw8qjqh9o2vf.png)
Where
and
are the compression and cutoff ratios, respectively.
![\eta_(th) = \left\{1-(1)/(18^(0.4))\cdot \left[(1.5^(1.4)-1)/(1.4\cdot (1.5-1)) \right] \right\}* 100\%](https://img.qammunity.org/2021/formulas/engineering/college/3jg09tcfgt23such297dchgczoyh3cyc85.png)

The heat addition to the cycle is:



The temperature at state 2 is:



And the temperature at state 3 is:


