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56 = 2(p + l)
56/2 = p + l
28 = p + l
28 ÷ ( 9 + 5 ) = 28 ÷ 14 = 2
panjang = 9 x 2 = 18m
lebar = 5 x 2 = 10m
luas = p x l
luas = 18 x 10
luas = 180m²
semoga membantu ^_^ follow dan jadi kan yang terbaik ya :-) terima kasih.
Panjang : lebar kebun = 9 : 5
Keliling kebun = 56 m
Dit:
Luas kebun berbentuk persegi panjang?
Jawab:
Jika panjang kebun = 9x dan lebar kebun = 5x maka:
keliling kebun = 2(p + l)
56 m = 2(9x + 5x)
56 = 2(14x)
56 = 28x
x = 56/28
x = 2 m
Panjang kebun
= 9x
= 9(2)
= 18 m
Lebar kebun
= 5x
= 5(2)
= 10 m
Luas kebun
= p × l
= 18 × 10
= 180 m^2