| 1. | \(32~\text N\) | 2. | \(36~\text N\) |
| 3. | \(16~\text N\) | 4. | \(27~\text N\) |

| 1. | \(\dfrac R {n^2}\) | 2. | \(\dfrac {R~(n-1)} n\) |
| 3. | \(\dfrac {Rn} { (n-1)}\) | 4. | \(\dfrac R n\) |
Starting from the centre of the earth, having radius \(R,\) the variation of \(g\) (acceleration due to gravity) is shown by:
| 1. | |
2. | ![]() |
| 3. | |
4. | |