Atrapezoidal river channel section has a basedimension of 30
feet, a liquid depth of 4 feet, and sideslopes of 4 to 1
(horizontal to vertical).
5.1 by integration, determine the locationof the centroid
relative to the channel bottom of this trapezoidalsection.
5.2 by integration, determine the moment ofinertia about a
horizontal axis at the channel bottom. usingthe parallel axis
theorem, determine the moment of inertia about ahorizontal axis
through the centroid.