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36x = 180
x = 180/36
= 5
p = 4 x 5 = 20 cm
l = 3 x 5 = 15 cm
t = 2 x 5 = 10 cm
V = 20 x 15 x 10
=3000 cm³
Pkb = 4 ( p + l + t )
180 = 4 ( 4a + 3a + 2a )
45 = 9a
a = 5 cm
Sehingga, volume balok tersebut :
V = p × l × t
= 4a × 3a × 2a
= 24a³
= 24 × ( 5 cm )³
= 3.000 cm³ atau 3 Liter