heeeeelpppp.....plssss
![Heeeeelppppplssss class=](https://ro-static.z-dn.net/files/d5c/dfb50e92662a3ccc09c5099202ae1af4.jpg)
Explicație pas cu pas:
A doua zi=15:3=5m
A treia zi=(15+5):4=20:4=5m
Şanțul are 15+5+5=25 m
R:25 m