Two particles held at different heights \( \mathrm{a} \) and \( \mathrm{b} \) above the ground a....

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Two particles held at different heights \( \mathrm{a} \) and \( \mathrm{b} \) above the ground are allowed to fall from rest. The ratio of their velocities on reaching the ground is:
(A) \( a: b \)
(B) \( \sqrt{\mathrm{a}}: \sqrt{\mathrm{b}} \)
(C) \( a^{2}: b^{2} \)
(D) \( a^{3}: b^{3} \)


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