From a circular disc of radius `R`, a triangular portion is cut (sec figure). The distance of the centre of mass of the remainder from the centre of the disc is `-`

From a circular disc of radius R , a triangular portion is cut (see figure). The distance of the centre of mass of the remainder from the centre of the disc is -

The figure shows a disc of radius 3R from which a circular hole of radius R is cut as shown in the figure. The distance of the centre of mass of the remaining object from the point O is

The figure shows a disc of radius 3R from which a circular hole of radius R is cut as shown in the figure. The distance of the centre of mass of the remaining object from the point O is

A circular disc of radius R is removed from a bigger circular disc of radius 2R such that the circumference of the disc coincide. the centre of the mass of the new disc from the centre of bigger disc is is

A circular disc of radius R is removed from a bigger circular disc of radius 2R such that the circumferences of the discs touch. The centre of mass of the new disc is at a distance aR from the centre of the bigger disc. The value of a is

A circular hole is cut from a disc of radius 6 cm in such a way that the radius of the hole is 1 cm and the centre of 3 cm from the centre of the disc. The distance of the centre of mass of the remaining part from the centre of the original disc is