p - l = 8 m
p = 8 m + l
Keliling kebun = 84 m
2(p + l) = 84 m
p + l = 42 m
8 m + l + l = 42 m
2l = 42 m - 8 m
2l = 34 m.
l = 34 m / 2
l = 17 m.
p = 8 m + 17 m = 25 m.
Luas kebun = p x l = 25 m x 17 m = 425 m^2.
D. 425 m^2.
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p - l = 8 m
p = 8 m + l
Keliling kebun = 84 m
2(p + l) = 84 m
p + l = 42 m
8 m + l + l = 42 m
2l = 42 m - 8 m
2l = 34 m.
l = 34 m / 2
l = 17 m.
p = 8 m + 17 m = 25 m.
Luas kebun = p x l = 25 m x 17 m = 425 m^2.
D. 425 m^2.