Two particles of masses `1kg` and `2kg` respectively are initially `10m` aprt. At time `t=0`, they start moving towards each other with uniform speeds `2m//s` and `1m//s` respectively. Find the displacement of their centre of mass at `t=1s`.

Explanation

To solve the problem, we need to find the displacement of the center of mass of the two particles after 1 second.

### Step-by-Step Solution:

1. **Identify the masses and initial positions:**
- Mass of particle 1, \( m_1 = 1 \, \text{kg} \)
- Mass of particle 2, \( m_2 = 2 \, \text{kg} \)
- Initial distance between them = 10 m
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