tolong dibantu yy kak,27-30

27 ) Harga buku diari
= 1,5 × Rp 1.250,00
= Rp 1.875,00

28 ) Jarak pada peta
= 975 km × 1/15.000
= 97.500.000 cm ÷ 15.000
= 6.500 cm

29 ) Skala
= 12 cm : 120 km
= 12 cm : 12.000.000 cm
= 1 : 1.000.000

30 ) Jumlah perbandingan = 3 + 2 = 5
Panjang = 3/5 × ( 100 ÷ 2 )
= 3/5 × 50
= 30 cm
Lebar = 2/5 × ( 100 ÷ 2 )
= 2/5 × 50
= 20 cm
Luas
= 30 cm × 20 cm
= 600 cm2