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For a given velocity, a projectile has the same range \( R \) for two angles of projection if \( t_{1} \) and \( t_{2} \) are the times of flight in the two cases then
[KCET 2003;
AIEEE 2004; Similar AIIMS 2008; DCE 2009]
(a) \( t_{1} t_{2} \propto R^{2} \)
(b) \( t_{1} t_{2} \propto R \)
(c) \( t_{1} t_{2} \propto \frac{1}{R} \)
(d) \( t_{1} t_{2} \propto \frac{1}{R^{2}} \)
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