A shell is fired from a gun from the bottom of a hill along its slope. The slope of the hill is ...

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A shell is fired from a gun from the bottom of a hill along its slope. The slope of the hill is \( \alpha=30^{\circ} \), and the angle of the barrel to the horizontal \( \beta=60^{\circ} \). The initial velocity \( v \) of the shell is \( 21 \mathrm{~m} / \mathrm{sec} \). Find the distance from the gun to the point at which the shell falls.
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