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4l^ =100
l^ =25
l =5
p= 4×l=4×5= 20
kel.persegi pnjang...
(2p)+(2l)=2*20+2*5
=40+10
=50
jadi kel min persegi pnjng 50 cm
maaf jika salah...
luas : p x l = tdk kurang dari 100
luas : (4 l) x l
4 l^2 = 100
2 l = 10
l = 5 meter dan p = (4) x 5 = 20 meter
keliling min : 2p + 2l
2(20) + 2(5) = 40 + 10
= 50 meter............................keliling min