Pada balok ABCD EFGH perbandingan AB : BC : CG = 5 : 4 : 3 jika luas ABCD adalah 180 cm², maka volume balok ABCD.EFGH adalah.. pakai cara dan rumus
5dregensleyer
Luas alas = 180 5a x 4a = 180 20a² = 180 a² = 180/20 a² = 9 a = √9 a = 3 panjang = 5 x 3 = 15 lebar = 4 x 3 = 12 tinggi = 3 x 3 = 9 volume = p x l x t = 15 x 12 x 9 = 1620 cm³
5a x 4a = 180
20a² = 180
a² = 180/20
a² = 9
a = √9
a = 3
panjang = 5 x 3 = 15
lebar = 4 x 3 = 12
tinggi = 3 x 3 = 9
volume = p x l x t
= 15 x 12 x 9
= 1620 cm³
jawabnnya 1620 cm³
BC = l
CG = t
AB : BC : CG = p : l : t
= 5 : 4 : 3
p = 5x
l = 4x
t = 3x
La = p × l
180 = 5x × 4x
180 = 20x²
9 = x²
√9 = √x²
3 = x
p = 5x
= 5(3)
= 15 cm
l = 4x
= 4(3)
= 12 cm
t = 3x
= 3(3)
= 9 cm
V = p × l × t
= 15 cm × 12 cm × 9 cm
= 1620 cm³
Jadi volume balok ABCD.EFGH adalah 1620 cm³