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A shell is fired from a gun from the bot...

A shell is fired from a gun from the bottom of a hill along its slope. The slope of the hill is `prop = 30^@` and the angle of the barrel to the horizontal `beta = 60^@`. The initial velocity `v` of the shell is `21 m s^-1`. Then find the distance of point from the gun at which the shell will fall.

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[30 m]
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