The range of a particle when launched at an angle of \( 15^{\circ} \) with the horizontal is \( ...

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The range of a particle when launched at an angle of \( 15^{\circ} \) with the horizontal is \( 1.5 \mathrm{~km} \). What is the range of the projectile when launched at angle of \( 45^{\circ} \) to the horizontal?
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