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When perimeter is minimum, discharge is:

When perimeter is minimum, discharge is: Correct Answer More

Explanation:

  • A section is said to be most efficient, if, for a given cross-section area, the discharge carrying capacity is maximum.
  • The highest component of total construction cost is of lining & if the perimeter is kept minimum the cost of lining will be minimum, hence it will be the most economical section.
  • There are some important sections and conditions to be most efficient;

 

Section

Condition

Rectangular

R = y/2

Triangular

θ = 45°

Trapezoidal
  • R = y/2
  • θ = 60°
  • Most efficient trapezoidal section is half hexagon

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