Tolong dijawab pliss....

Lp₁=3,14×10×20
    =628

Lp₂=3,14×5×8
     =125,6

Lp₃=3,14×5×5
      = 78,5

Lp total= Lp₁-Lp₂+Lp₃
            = 628-125,6+78,5
            =580,9cm