In falling head permeability test, change in the head at a time interv

1.	In falling head permeability test, change in the head at a time interval dt is denoted as__________?
A.	dh
B.	‚Äö√Ñ√∂‚àö√ë‚àö¬®dh
C.	h
D.	‚Äö√Ñ√∂‚àö√ë‚àö¬®h
Answer» C. h

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