Motion In A Plane

If bullets are fired in all possible directions from same point with equal velocity of $10 \mathrm{~ms}^{-1}$ and with an angle of projection $45^{\circ}$, then the area covered by the bullets on the ground is nearly
(Acceleration due to gravity $=10 \mathrm{~m} \mathrm{~s}^{-2}$ )