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## Homework Statement

Consider a planet in some solar system which has a mass double the mass of Earth and same density as of Earth . What is the weight of object on the planet in terms of 'W' , where 'W' is weight of object on Earth

## Homework Equations

W=mg ... density = M / V . ... g=GM/R

^{2}

## The Attempt at a Solution

since they both have same density..

i equated their M/V ratios and it gets me the ratio of their radii ..

but it still gets me nowhere