1.

The hydraulic diameter, Dh of a rectangular duct with side ‘a’ and ‘b’ is

A. \( {D_h} = \frac{{4ab}}{{2a + b}}\)
B. \({D_h} = \frac{{2ab}}{{a + b}}\)
C. \({D_h} = \frac{{2ab}}{{2a + b}}\)
D. \({D_h} = \frac{{4ab}}{{a + b}}\)
Answer» C. \({D_h} = \frac{{2ab}}{{2a + b}}\)


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