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Prove that the three sides of the trapezoidal section of most economical section are tangential to the semi circle on the water line
written 7.9 years ago by gravatar for mitali.poojari1908 mitali.poojari1908 • 400 modified 3.7 years ago by gravatar for RakeshBhuse RakeshBhuse • 3.2k
applied hydraulics
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written 3.7 years ago by gravatar for RakeshBhuse RakeshBhuse • 3.2k

The three sides of the trapezoidal section of most economical section are tangential to the semi-circle described on the water line. This is proved as

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Let Fig.shows the trapezoidal channel of most economical section

Let $\theta=$ angle made by the the sloping sides with horizontal

Draw $O F$ perpendicular to …

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