Three rods each of mass 
and length 
are joined together end-to-end to form an equilateral triangle 
. Find the moment of inertia of this system about an axis passing through its centre of mass and perpendicular to the plane of the triangle.
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Given, mass of rods, 
Length of rod, 
Moment of inertia of rod about centre of rod,
and 
are mid points of side 
and 
is centroid
From parallel axis theorem,
and for three rods,
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