NEET Exam Model Paper 7

Moment of inertia of each of the point masses (m) at B and C about the side BC=m(0)2=0.
Moment of inertia of point mass m at A about the side BC=m(AD)2.
Now AD=lsin60°=l

√3

2

∴ Moment of inertia of the system about side BC
=0+0+m(

l√32

2

)=

3ml2

4