A homogeneous gas phase reaction A3B follows a second order kinetics. For a feed rate of 4m3/hr of pure A at 5atm and 350C, an experimental reactor consisting of a 2.5cm ID pipe 2-m long gives 60% conversion of feed. A commercial plant is to treat 320m3/hr of feed consisting of 50% A, 50% inerts at 25atm and 350C to obtain 80% conversion. How many 2-m lengths of 2.5cm ID pipe are required? Assume: plug flow in the pipe, ideal gas behavior, and neglect pressure drop