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A body is projected from the earth at angle $30^{\circ}$ with the horizontal with some initial velocity. If its range is 20 m, the maximum height reached by it is : (in meters)

\[\begin {array} {1 1} (a)\;5 \sqrt 3 & \quad (b)\;\frac{5}{\sqrt 3} \\ (c)\;\frac{10}{\sqrt 3} & \quad (d)\;10 \sqrt 3 \end {array}\]

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$(b)\;\frac{5}{\sqrt 3}$
answered Nov 7, 2013 by pady_1

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