TOLONG BANTU DARURAT 1 - 5 SAMA CARA

1]
Jumlah penduduk = 1400 jiwa
Perempuan (P) = 750 jiwa
Laki-laki (L) = 1400 - 750 = 650 jiwa

L : P = 650 : 750
L : P = 13 : 15 (b)

2]
Jumlah siswa sekelas = 40 siswa
L : P = 5 : 3

P = 3/(5+3) × 40
P = 3/8 × 40
P = 15 siswa (b)

3]
Skala = 1 : 5.000
Js = 800 m = 80.000 cm

Jp = Js × skala
Jp = 80.000 cm × 1/5.000
Jp = (80.000/5.000) cm
Jp = 16 cm (b)

4]
Js = 60 km = 6.000.000 cm
Skala = 1 : 500.000

Jp = Js × skala
Jp = 6.000.000 cm × 1/500.000
Jp = (6.000.000/500.000) cm
Jp = 12 cm (c)

5]
Harga 10 m kain batik = Rp 150.000,00

Harga 5 m kain batik yang sama
= 5/10 × Rp 150.000,00
= Rp 75.000,00 (b)