(d) $Horizontal\ range,\ \ R = \frac{u^{2}\sin^{2}45{^\circ}}{2g} = \frac{u^{2}}{g}$ $Maximum\ height,\ \ \ H = \frac{u^{2}\sin^{2}45{^\circ}}{g} = \frac{u^{2}}{4g}$ $\therefore\ \ \frac{R}{H} = \frac{4}{1}$
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.