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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
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written 2.2 years ago by |
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
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 …