**Question:**

The following is the distance-time graph of amit's walking.

Study the above graph carefully and answer the questions given below:

(i) When does Amit make the least progress? Explain your answer.

(ii) Find his average speed in km/hr.

**Solution:**

(i) Amit make least progress from 25 min to 40 min, as indicated by the line in the graph.

(ii) Total distance covered = 2km

Total time $=55 \mathrm{~min}=\frac{55}{60} \mathrm{hr}$

Average speed $=\frac{\text { Total } \text { distance covered }}{\text { Total time }}=\frac{2}{55} \times 60=2.18 \mathrm{~km} / \mathrm{hr}$