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Three identical metal balls each of radi...

Three identical metal balls each of radius `r` are placed touching other on a horizontal surface such that an equilateral triangle is formed with centers of three balls joined. The centre of mass of the system is located at

A

at one of the centres of the spheres

B

at the mid point joining the centres of any two spheres.

C

at the point of intersection of the medians of the triangle formed by the centres of the three spheres.

D

at the mid point of a median of the triangle formed by the centres of the three spheres.

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The correct Answer is:
C
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