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 $=10 \mathrm{~m} \mathrm{~s}^{-2}$ )
- A
$628 \mathrm{~m}^2$
- B
$314 \mathrm{~m}^2$
- C
$157 \mathrm{~m}^2$
- D
$79 \mathrm{~m}^2$
✓ Correct answer: B
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