1.

The average drainage path for the pressure increment is calculated from the formula of ______

A. \(d=\frac{1}{2} \left[\frac{H_{‘}-H_f}{2}\right] \)
B. \(d=\frac{1}{2} \left[\frac{H_{‘}}{2}\right] \)
C. \(d=\frac{1}{2} \left[\frac{H_{‘}-H_f}{4}\right] \)
D. \(d=\frac{1}{2} \left[\frac{H_f-H_{‘}^{’}}{2}\right] \)
Answer» B. \(d=\frac{1}{2} \left[\frac{H_{‘}}{2}\right] \)


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