Jawab dua duanya ya , besok mid . Tolong banget

4) A : B = 3 : 2 
B : C = 3 : 5

*atas x3,bawah x2

A : B :C = 9 : 6 : 10
A + B + C = Rp1.000.000
9 + 6 + 10 = 1 x 10⁶
25 = 10⁶
x =10⁶/25
= 40.000

A + C = 9(40.000) + 10(40.000)
= 360.000 + 400.000
= Rp760.000,-

5) p : l = 8 : 5
p - l = 6

> 8ₓ - 5ₓ = 6
3ₓ = 6
ₓ = 6/3 = 2

p = 8 x 2 = 16 cm
l = 5 x 2 = 10 cm

k = 2(p+l)
= 2 (16 + 10)
= 2 x 26
= 52 cm 

semoga membantu, maaf kalau salah, mohon dikoreksi ><