pls to na jutro plsss
![Pls To Na Jutro Plsss class=](https://pl-static.z-dn.net/files/d95/7ca9c5529f19558ce7f2aea8b05996a6.jpg)
a=170mm
b=120mm
Ob = 2a + 2b
Ob = 2*170mm + 2*120mm
Ob = 340mm + 240mm
Ob = 560mm
Pozdrawiam~zjawa0306.