A stratum of clean sand and gravel between two channels has a hydraulic conductivity K =10-1 cm/sec and is supplied with water from a ditch (h0 = 9 ft deep) that penetrates to the bottom of the stratum. If the water surface in the second channel is 2 ft above the bottom of the stratum and its distance to the ditch is X = 30 ft, which is also the thickness of the stratum, what is the unit flow rate into the gallery