Following gas phase elementary reaction are carried out in PFRat 2.5℃ and 48.9 atm. The feed concentration of only A. Thespecific reaction rate for the 1st and 2nd reaction are 2 /min and1/ min respectively. The gas constant 0.082 Lㆍate/Kㆍmol. A->B->C

Find out the space time, τ which satisfy the maximumconcentration of B.