Tolong ya kak, Pake cara yaaa

12. 75.000.000 : 30 = 1: 2500 (c)

10)
64°R = (5/4 × R)°C
64°R = (5/4 × 64)°C
64°R = 80°C (b)

11)
p = 6 cm
l = 5 cm
skala = 1 : 500
Ld = p × l
Ld = 6 cm × 5 cm
Ld = 30 cm^2

Ls = Ld : (skala)^2
Ls = 30 cm^2 : (1/500)^2
Ls = 30 cm^2 : (1/250000)
Ls = 30 cm^2 × 250000
Ls = 7500000 cm^2
Ls = 750 m^2 (b)

Atau

p = 6 cm
ps = 6 cm : (1/500)
ps = 6 cm × 500
ps = 3000 cm
ps = 30 m

l = 5 cm
ls = 5 cm : (1/500)
ls = 5 cm × 500
ls = 2500 cm
ls = 25 m

Ls = ps × ls
Ls = 30 m × 25 m
Ls = 750 m^2 (b)


12)
ps = 750 km
pp = 30 cm

skala = pp : ps
skala = 30 cm : 750 km
skala = 30 cm : 75.000.000 cm
skala = 1 : 2.500.000 (c)