no 2-4 pake cara........................

2 a = p:l = 12:8 : 3:2
b = p : k =12 : ( 24 + 16 ) = 12:40=3/10
c = l : k = 8:40 = 1/5

3. 4/3 × 4.800.000 = 6.400.000

4. a. 216 cm³ = S³
6 = S
6 = 2X
3 = X

V = S³
= 15× 15 × 15
= 225×15
= 3375cm³
b. Sisi 1 : Sisi 2
(2×3). : (5×3)
6cm : 15cm
Sisi 1 = 6cm
Sisi 2 = 15 cm.