Physics - Kinematics Question with Solution | TestHub

A rectangular farm- house has a 1 km difference between its sides. Two farmers simultaneously leave one vertex of the rectangle for a point at the opposite vertex. One farmer crosses the farmhouse along its diagonal and other walks along the bank. The speed of each farmer is $4\mathrm{km}/\mathrm{hr}$. If one of them arrives half an hour earlier than the other then the size of farmhouse is-