The following homogeneous, irreversible reaction involving ideal gases, A⟶B+C (-r_A)=0.5C_A (mol L^-1 s^-1) is carried out in a steady state ideal plug flow reactor (PFR) operating at isothermal and isobaric conditions. The feed stream consists of pure A, entering at 2m s^-1. In order to achieve 50% conversion of A, the required length of the PFR is _______ meter (round off to 2 decimal places).