A projectilel can have the same range \( R \) for two angles of pro...

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A projectilel can have the same range \( R \) for two angles of projection. If \( t_{1} \) and \( t_{2} \) be the times of flight in two cases, then what is the product of two times of flight?
(a) \( \mathrm{t}_{1} \mathrm{t}_{2} \propto \mathrm{R} \)
(b) \( \mathrm{t}_{1} \mathrm{t}_{2} \propto \mathrm{R}^{2} \)
(c) \( t_{1} t_{2} \propto 1 / R \)
(d) \( t_{1} t_{2} \propto 1 / R^{2} \)
\( \mathrm{P} \)
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