The range of projectile which is launch at an angle of $15^{\circ}$ with the horizontal is $1.5 \;km$ what is the range of the projectile if it is projected at an angle of $45^{\circ}$ to the horizontal ?

Question

$\begin{array}{1 1}(A)\;1.5 km\\(B)\;3.0\;km \\(C)\;6.0 km\\(D)\;0.75 \;km \end{array}$