Gravity earth's radius question

[physicshard22]

Homework Statement

The force of gravity on an astronaut is 600N at the Earth's surface. what is the force of gravity acting on him at a distance of 10 times the Earth's radius?

Homework Equations

F = Fm1m2/r^2

The Attempt at a Solution

F = Gm1m2/r^2
F = 600/11r^2
F = 4.96N

11r because its measured from the surface of the earth

 

[Stonebridge]

I think it means at a distance of 10 times R from the centre of the Earth. (not from the surface)