Two circles of radii `10\ c m\ a n d\ 8\ c m` intersect and the length of the common chord is `12 c mdot` Find the distance between their centres.

Explanation

To solve the problem of finding the distance between the centers of two intersecting circles with given radii and the length of the common chord, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Given Values:**
- Radius of Circle O (R1) = 10 cm
- Radius of Circle O' (R2) = 8 cm
- Length of the common chord (PQ) = 12 cm
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