Equation of trajectory of a projectile is a Y=10x-(5/9)x^2
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As we are known that range is stay on X axis and Y axis become 0.
Then you must put Y value =0, 0 = 10 x5/9x 2 t5/9x=10 x=10*9/5x=90/5.
Therefore the x=18.
Therefore the range of meter is between hope this helps the student to understand right answer without meeting any trouble of it.
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