Hydraulics and Fluid Mechanics in ME
The hydraulic mean depth or the hydraulic radius is the ratio of

Velocity of flow and area of flow
Wetted perimeter and diameter of pipe
Area of flow and wetted perimeter
None of these

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Hydraulics and Fluid Mechanics in ME
A floating body is said to be in a state of stable equilibrium

when the metacentre is above the centre of gravity
only when its centre of gravity is below its centre of buoyancy
when the metacentre is below the centre of gravity
when its metacentric height is zero

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