Sure, here is the translation of the question into English:

A $---$k$1--->$ B $--$k$2-->$ C series reaction is desired to be carried out in the following reactor systems to produce B$.$

k$1=0\mathrm{.}15$ min$^-1,$ k$2=0\mathrm{.}05$ min$^-1$ Ca$0=2$ mol$/$L $,$ Cb$0=$Cc$0=0$ volumetric feed rate $150$ L$/$min$.$

For a $300$ L PFTR

What would be the reactor outlet concentration?