A projectile fired with initial velocity $u$ at some angle $\theta $ has a range $R$. If the initial velocity be doubled at the same angle of projection, then the range will be
$2R$
$R/2$
$R$
$4R$
A projectile fired with initial velocity $u$ at some angle $\theta $ has a range $R$. If the initial velocity be doubled at the same angle of projection, then the range will be
$R = \frac{{{u^2}\sin 2\theta }}{g}$
$\therefore R \propto {u^2}$. If initial velocity be doubled then range will become four times.