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Graviational acceleration on the surface of planet is `(sqrt6)/(11)g.` where g is the gravitational acceleration on the surface of the earth. The average mass density of the planet is `(2)/(3)` times that of the earth. If the escape speed on the surface of the earth is taken to be `11 kms^(-1)` the escape speed on the surface of the planet in `kms^(-1)` will be

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