Weight if Earth had twice its radius and mass

[Michaelenetaylor]

is this inverse square law --- help!

If the Earth had twice its present radius and twice its present mass, what would happen to your weight? Explain

 

[Päällikkö]

https://www.physicsforums.com/showthread.php?t=5374"
Use Newton's law of gravitation:
$$F = \frac{GMm}{r^2}$$