A particle is projected at an angle of \( 45^{\circ} \) from a point lying 2 \( \mathrm{m} \) fr...

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A particle is projected at an angle of \( 45^{\circ} \) from a point lying 2 \( \mathrm{m} \) from the foot of a wall. It just touches the top of the wall and falls on the ground \( 4 \mathrm{~m} \) from it. The height of the wall is
(a) \( 3 / 4 \mathrm{~m} \)
(b) \( 2 / 3 \mathrm{~m} \)
(c) \( 4 / 3 \mathrm{~m} \)
(d) \( 1 / 3 \mathrm{~m} \)
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