The radius of the earth is r. A satellite of mass 100kg is at a point 3r above the earths surface. What is the satellites' weight?

6.3 N

110 N

61N

38 N

240 N

Thanks! Please show what calculations you are using to solve

PS: What i dont understnad is why they are asking for the weight while the state teh mass is 100kg? Grr, i dont understand!