1. **State the problem:** Hollie ran 1 km in 4 minutes and 22 seconds. We need to find her speed in metres per second (m/s). 2. **Convert units:** - Distance: 1 km = 1000 metres. - Time: 4 minutes and 22 seconds = $4 \times 60 + 22 = 240 + 22 = 262$ seconds. 3. **Use the speed formula:** $$\text{speed} = \frac{\text{distance}}{\text{time}}$$ 4. **Calculate speed:** $$\text{speed} = \frac{1000}{262}$$ 5. **Simplify the fraction:** $$\text{speed} = \frac{\cancel{1000}}{\cancel{262}} \approx 3.816793893$$ 6. **Round to 1 decimal place:** $$\text{speed} \approx 3.8 \text{ m/s}$$ **Final answer:** Hollie's speed was approximately 3.8 metres per second.