Define speed. What is its S.I. unit?

Explanation

### Step-by-Step Text Solution

1. **Definition of Speed**:
- Speed is defined as the rate at which an object covers distance. It indicates how fast an object is moving. Mathematically, speed can be expressed as:
\[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} \]
This means that speed is calculated by dividing the total distance traveled by the total time taken to travel that distance.
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