1. pak budi memiliki sawah berbentuk persegi panjang dgn keliling 120m. adapun perbandingan antara panjang dan lebar 3:2. hitunglah: a.panjang dan lebar b. luas sawah pak budi 2.pak kamto memiliki berbentuk persegi panjang.panjang tersebut 2 kali lebarnya jika keliling persegi panjang 48 cm. hitunglah: a.panjang dan lebar b. luas kebun tersebut c. jika kebun pak kamto 5kg singkong untuk setiap 1mpersegi. berapakah kg
Ridafahmi
1) 2(p + l) = k 2 (p + l) = 120 p + l = 120/2 p + l = 60
jumlah perbandingan = 3 + 2 = 5
a) p = 3/5 × 60 cm = 36 cm l = 2/5 × 60 cm = 24 cm
b) L = p × l = 36 × 24 cm² = 864 cm²
2) p = 2 l
a. K = 2 (p + l) p = 2l 48 = 2 (2l + l) p = 2 × 8 48 = 2 × 3l p = 16 m 48 = 6l l = 48/6 l = 8 m
b. L = 16 × 8 m² = 128 m²
c. hasil singkong = 128 m² × 5 kg = 640 kg
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Syubbana1) 2(p+l) = k 2(3x + 2x) = 120 10x = 120 x = 12
panjang = 3x = 36 m lebar = 2x = 24 m luas = pl = 36 x 24 = 864 m^2
2) 2(p+l) = k 2(2l+l) = 48 6l = 48 l = 8 m p = 16 m b) luas = 8x16 = 128 m^2 c) 128 x 5 = 640 kg
2 (p + l) = 120
p + l = 120/2
p + l = 60
jumlah perbandingan = 3 + 2 = 5
a) p = 3/5 × 60 cm
= 36 cm
l = 2/5 × 60 cm
= 24 cm
b) L = p × l
= 36 × 24 cm²
= 864 cm²
2) p = 2 l
a. K = 2 (p + l) p = 2l
48 = 2 (2l + l) p = 2 × 8
48 = 2 × 3l p = 16 m
48 = 6l
l = 48/6
l = 8 m
b. L = 16 × 8 m²
= 128 m²
c. hasil singkong = 128 m² × 5 kg
= 640 kg
2(3x + 2x) = 120
10x = 120
x = 12
panjang = 3x = 36 m
lebar = 2x = 24 m
luas = pl
= 36 x 24
= 864 m^2
2) 2(p+l) = k
2(2l+l) = 48
6l = 48
l = 8 m
p = 16 m
b) luas = 8x16
= 128 m^2
c) 128 x 5 = 640 kg