A.panjang,lebar,dan tinggi sebuah balok berbanding3:2:1 jika volume balok 750cm kubik maka luas permukaan balok adalah... B.kawat yang panjangnya 6m akan dibuat

B.(13x4)+(9x4)+(8x4)
52+36+32
120 cm

6m=600cm

600:120=5

C.kubus 1 = 16x16x16=4096
Kubus 2 =24x24x24=13824

13824 : 4096
27 : 8

Semoga membantu :)

a.
p : l = 3 : 2 => p = (3/2)l
l : t = 2 : 1 => t = (2/1)l

V = p × l × t
750 = (3/2)l × l × (2/1)l
750 = (6/2)l³
l³ = 750 × (2/6)
l³ = 250
l = ³√250
l = 5 ³√2 cm

p = (3/2)l
= 3/2 × 5³√2
= 15/2 ³√2 cm

t = (2/1)l
= 2/1 × 5³√2
= 10 ³√2 cm

Lp = 2 (pl+pt+lt)
= 2 (15/2 ³√2×5 ³√2 + 15/2 ³√2×10 ³√2 + 5 ³√2×10 ³√2 )

p : l = 3 : 2 => p = (3/2)l
l : t = 2 : 1 => t = (2/1)l

V = p × l × t
750 = (3/2)l × l × (2/1)l
750 = (6/2)l³
l³ = 750 × (2/6)
l³ = 250
l = ³√250
l = 5 ³√2 cm

p = (3/2)l
= 3/2 × 5³√2
= 15/2 ³√2 cm

t = (2/1)l
= 2/1 × 5³√2
= 10 ³√2 cm

Lp = 2 (pl+pt+lt)
= 2 (15/2 ³√2×5 ³√2 + 15/2 ³√2×10 ³√2 + 5 ³√2×10 ³√2)
= 2 (325³√4/2)
= 325 ³√4 cm²

Jadi, luas permukaan balok tsb adalah 325 ³√4 cm².

Maaf,, kalo salah...