--> //initializations

--> l=100 //mm (distance between piezometer tapping)
 l  = 

   100.


--> H=60 //mm (differnece of water levels in piezometer)
 H  = 

   60.


--> d=100 //mm (diameter of the test sample)
 d  = 

   100.


--> qw=350 //ml (quantity of water collectd)
 qw  = 

   350.


--> t=270 //sec (duration of the time)
 t  = 

   270.


--> //calculations

--> L=l/10 //cm (distance between piezometer tapping)
 L  = 

   10.


--> D=d/10 //cm (diameter of the test sample)
 D  = 

   10.


--> h=H/10 //cm (differnece of water levels in piezometer)
 h  = 

   6.


--> q=qw/t //ml/sec (discharge)
 q  = 

   1.2962963


--> A=(%pi*(D^2))/4 //cm^2 (area)
 A  = 

   78.539816


--> k=(q*l)/(A*H) // (coefficient of permeability of soil)
 k  = 

   0.0275083


--> //results

--> printf('coefficient of permeability of the soil=%f',k) //cm/sec
coefficient of permeability of the soil=0.027508