Answer:
37.8 m
Explanation:
The computation of the distance is shown below:
In triangle ADE
![AD^2 = AE^2 + DE^2 \\\\ AD^2 = 5^2 + 3^2 \\\\ AD^2 = 34](https://img.qammunity.org/2021/formulas/mathematics/high-school/nla74t8h8kl047qnnf3f5h8o1wmn8q0n9f.png)
AD = 5.8
Now the distance walked after completing his edging is
Distance = AD + AB + BC + CD
= 5.8 + 12 + 5 + 15
= 37.8 m
We simply added these four sides so that the correct distance could arrive
Hence, the distance walked after completing his edging is 37.7