A projectile is projected at an angle $\mathrm{\alpha }\left(>45°\right)$ with an initial velocity $u$. The time $t$ at which its horizontal component will equal the vertical component in magnitude:

Two stones are projected from the level ground. Trajectories of two stones are shown in the figure. Both stones have same maximum heights above level ground as shown. Let $T_1$ and $T_2$ be their time of flights and $u_1$ and $u_2$ be their speeds of projection respectively (neglect air resistance). Then