Question

A circular disc of radius R is removed from a bigger circular disc of radius 2R such that the circumferences of the discs coincide. The centre of mass of the new disc is  α/R from the centre of the bigger disc. The value of  α is

(a) 1/4 

(b) 1/3

(c) 1/2 

(d) 1/6. 

Answer 1

The correct answer is:

The question should be at a distance  αR and not
 α/R.