Problem 8.- In a drying process that will perform the partial dehydration of sludge generated in a water treatment plant, it is known that the sludge fed to the dryer contains 70% water and 30% dissolved solids, the resulting product (sludge ) must contain 25% water, taking into account that the dryer operates continuously, using the given data, estimate how much water will evaporate in kg/hr for each ton of sludge that is introduced into the dryer each hour.