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70 = 2(5 + l + l)
70 = 2(5 + 2l)
70 = 10 + 4l
60 = 4l
l = 60/4
l = 15
P = 5 + l
= 5 + 15
= 20
L = p x l
= 20 x 15
= 300 m^2
panjang P
Lebar L
P = 5+L
L = L
Keliling = 70 meter
keliling = 2P + 2L
70 = 2P + 2L
70 = 2(5+L) + 2L
70 = 10 + 2L + 2L
60 = 4L
L = 15meter
P = 5+15
P = 20m
Luas = PxL
Luas = 20 x 15
Luas = 300m²