Newly discovered planet has twice the mass and three times the radius of the earth. what is the free-fall acceleration at its surface, in terms of the free-fall acceleration g at the surface of the earth?

Determine the time it takes for a satellite to orbit the earth in a circular "near-earth" orbit. the definition of "near-earth" orbit is one which is at a height above the surface of the earth which is small compared to the radius of the earth, so that you may take the acceleration due to gravity as essentially the same as that on the surface. does your result depend on the mass of the satellite?