Subjects physics

Average Speed 3F7010

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1. **State the problem:** We need to find the jogger's average speed in kilometers per minute given three segments of jogging distances and times. 2. **Formula:** Average speed is total distance divided by total time: $$\text{Average speed} = \frac{\text{Total distance}}{\text{Total time}}$$ 3. **Calculate total distance:** $$4.0 + 2.0 + 1.0 = 7.0 \text{ kilometers}$$ 4. **Calculate total time:** $$32 + 22 + 16 = 70 \text{ minutes}$$ 5. **Calculate average speed:** $$\text{Average speed} = \frac{7.0}{70}$$ 6. **Simplify the fraction:** $$\frac{7.0}{70} = \frac{\cancel{7} \times 1.0}{\cancel{7} \times 10} = \frac{1.0}{10} = 0.1$$ 7. **Final answer:** The jogger's average speed is **0.1 kilometers per minute**.