kak tolong di bantu menjawabnya ya
a. p = 4a = 4x5 = 20 cm
l = 2a = 2x5 = 10 cm
t = 3a = 3x5 = 15 cm
b. 180 cm
c. V = 3.000 cm²
Penjelasan dengan langkah-langkah:
p = 4a cm
l = 2a cm
t = 3a cm
2(pl + pt + lt) = L
pl + pt + lt = L/2
4a x 2a + 4a + 3a + 2a x 3a = 1300/2
8a² + 12a² + 6a² = 650
26a² = 650
a² = 650/26
= 25
a = √25 = 5
a. p = 4a = 4x5 = 20 cm
l = 2a = 2x5 = 10 cm
t = 3a = 3x5 = 15 cm
b. panjang kerangka balok
= 4 x (p + l + t)
= 4 x (20 + 10 + 15)
= 4 x 45
= 180 cm
c. V = p x l x t
= 20 x 10 x 15
= 3.000 cm³
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