Two bodies of masses `1kg` and `3kg` are lying in `xy` plane at `(0,0)` and `(2,-1)` respectively. What are the coordinates of the centre of mass ?
Hint. `x_(cm)=(m_(1)x_(1)+m_(2)x_(2))/(m_(1)+x_(2))`, `y_(cm)=(m_(1)y_(1)+m_(2)y_(2))/(m_(1)+m_(2))`

Explanation

To find the coordinates of the center of mass of two bodies with given masses and positions, we can use the formulas for the center of mass in the x and y directions.

### Step-by-Step Solution:

1. **Identify the masses and their coordinates:**
- Mass of body 1, \( m_1 = 1 \, \text{kg} \)
- Coordinates of body 1, \( (x_1, y_1) = (0, 0) \)
- Mass of body 2, \( m_2 = 3 \, \text{kg} \)
...