A particle is projected upwards. The times corresponding to height \( h \) while ascending and w...

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A particle is projected upwards. The times corresponding to height \( h \) while ascending and while descending are \( t_{1} \) and \( t_{2} \) respectively. The velocity of projection will be [KCET 2008]
(a) \( g t_{1} \)
(b) \( \mathrm{gt}_{2} \)
(c) \( g\left(t_{1}+t_{2}\right) \)
(d) \( \frac{g\left(t_{1}+t_{2}\right)}{2} \)
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