10 m thick confined aquifer gives the steady-state discharge of 0.03 m3/s through the well of 50 cm radius. Due to pumping, the height of water in the well is dropped from 15 m to 10m and the radius of influence is obtained as 500 m. What is the coefficient of permeability (mm/s)?
1
0.66
2
0.99
3
1.25
4
6.89