A uniform disc of radius R is put over another unifrom disc of radius 2R of the same thickness and density. The peripheries of the two discs touch each other. Locate the centre of mass of the system.

Explanation

To locate the center of mass of the system consisting of two uniform discs, we will follow these steps:

### Step 1: Define the system and parameters
We have two discs:
- Disc 1 (smaller disc) with radius \( R \)
- Disc 2 (larger disc) with radius \( 2R \)

Both discs have the same thickness and density.
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