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[" 9.A particle is taken to a height K t...

[" 9.A particle is taken to a height K times radius of Earth,about the surface of earth "],[" and projected at an angle of "30^(@)" to the vertical.During its subsequent motion,it "],[" just grazes the surface of earth with a velocity "(sqrt(15))/(4)" times the escape velocity from "],[" the surface of earth.Find the value of "K(K<9)" ."]

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