Question

If the discharge velocity is 4*10^-7cm/s and the porosity is 33%, then the seepage velocity will be _______

(a) 18*10^-7cm/s

(b) 12*10^-7cm/s

(c) 6*10^-7cm/s

(d) 3*10^-7cm/s

This question was addressed to me by my school principal while I was bunking the class.

This interesting question is from Permeability in division Permeability of Geotechnical Engineering I

Answer 1

Right option is (b) 12*10^-7cm/s

The best I can explain: Given,

discharge velocity V=4*10^-7cm/s

porosity n=33%=0.33

seepage velocity Vs=V/n=(4*10^-7)/0.33

∴ Vs=12*10^-7cm/s.