Final stage of production in the preparation of a pharmaceutical drug requires centrifugation and filtration. One of the streams coming out of the filtration unit is taken as product with 7% water content, and the other stream is recycled and mixed with feed to be centrifuged. Fresh feed is brought into the system at a rate of 100 kg/h containing 80% water, and the centrifuged product contains 35% water before filtration. If the recycle stream is 50% water, determine the flow rate of the recycle stream.