A particle is projected under gravity with velocity \( \mathrm{P} \) \( \sqrt{2 a g} \) from a p...
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15A particle is projected under gravity with velocity
\( \mathrm{P} \) \( \sqrt{2 a g} \) from a point at a height \( h \) above the level plane. The maximum range \( R \) on the ground is
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(A) \( \sqrt{\left(a^{2}+1\right) h} \)
(B) \( \sqrt{a^{2} h} \)
(C) \( \sqrt{a h} \)
(D) \( \quad 2 \sqrt{a(a+h)} \)
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