Answer:
21.1 m
Step by step explanation
Total length of pole = 21.3 m
Length of pole inside the ground = 0.2 m
Let length of pole outside the ground be X,
So, according to the Question,
![x + 0.2 = 21.3](https://img.qammunity.org/2021/formulas/mathematics/college/rpb4p0pkok8u0k1tmctqzkstg8c2r15egn.png)
Move constant to R.H.S and change its sign
![x = 21.3 - 0.2](https://img.qammunity.org/2021/formulas/mathematics/college/2xdobpuf24vxhcu7c329i0pe91fwfzedx6.png)
Calculate the difference
![x = 21.1 \: m](https://img.qammunity.org/2021/formulas/mathematics/college/bqtne8nnjuwfvqq9xgll5th7sv55ghxx4d.png)
Hope this helps...
Good luck on your assignment...