Engineering Mechanics
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the width (b), is

db³/36
bd³/12
db³/12
bd³/36

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Engineering Mechanics
The term 'Centroid' is

The same as centre of gravity
The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
The point of suspension
None of the listed here

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