In a race of 100 m, A gives B a start of 10 m. What distance will be covered by B?

Answer

To solve the problem, we need to determine how far B will run when A completes the 100 meters, given that A gives B a head start of 10 meters.

### Step-by-Step Solution:

1. **Understanding the Race Setup**:
- The total distance of the race is 100 meters.
- A gives B a head start of 10 meters. This means that when A starts running, B has already covered 10 meters.

2. **Distance Covered by A**:
- When A finishes the race, he has covered 100 meters.

3. **Calculating the Distance Covered by B**:
- Since B has a head start of 10 meters, he only needs to cover the remaining distance of the race.
- Therefore, when A runs 100 meters, B would have covered:
\[ \text{Distance covered by B} = \text{Total distance} - \text{Head start} \]
\[ \text{Distance covered by B} = 100 \text{ m} - 10 \text{ m} = 90 \text{ m} \]

4. **Conclusion**:
- Thus, when A finishes the race at 100 meters, B will have covered 90 meters.

### Final Answer:
B will cover a distance of 90 meters.

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