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From a certain height, two bodies are projected horizontally with velocities \( 10 \mathrm{~m} / \mathrm{s} \) and \( 20 \mathrm{~m} / \mathrm{s} \). They hit the ground in \( t_{1} \) and \( t_{2} \) seconds. Then :-
(A) \( t_{1}=t_{2} \)
(B) \( t_{1}=2 t_{2} \)
(C) \( t_{2}=2 t_{1} \)
(D) \( t_{1}=\sqrt{2 t_{2}} \)
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