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[" 12.A small body of mass 'm' is projec...

[" 12.A small body of mass 'm' is projected from the surface of a given planet as shown "],[" in the figure.If small body has velocity which is just sufficient to get out from the "],[" gravity of planet then time taken by small body to reach at height of 3R from the "],[" surface of planet is "K sqrt((2R^(3))/(GM))" .Find the value of "K],[qquad (1)/(2)=(1)/(2)]

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