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//example 16.6
//calculate permeability coefficient
clc;funcprot(0);
//given
L=30; //spacing between drans
Q=4D-6; //discharge
a=8;
b=8.3;
k=1000000*Q*L/(4*(b^2-a^2));
k=round(k*100)/100;
mprintf("permeability coefficient=%fD-6 m/sec.",k);
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