Question 3
The homes of An, Binh, Hanh and Phuc and their school lie along the same road, in the order shown. Phuc lives $600\text{ m}$ from school. One day all four start at the same time, and each takes $15$ minutes to reach school at a constant speed. When Phuc has walked $\frac13$ of his route, Hanh reaches Phuc’s home, Binh reaches Hanh’s home and An reaches Binh’s home. How far is An’s home from school, in metres?
