A well is fully penetrated into a 20 m thick sand layer underlain by an impermeable layer. The coefficient of permeability of the soil is found to be 0.10 cm/sec. When the water is pumped out at a rate of 0.2 m3/sec, the water level in the first observation well situated at 15 m from the test well is found to be 15 m from the bottom of the well, the water level from the bottom in the second observation well situated at a distance of 45 m from the test well is (in m up to 2 decimal places)
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