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Klo ada yg g ngerti bisa ditanyaMateri:
Bangun Ruang
Pembahasan:
Dik:
- p : l : t
5 : 4 : 3
- L abcd= 80 cm²
Dit: V. Balok?
Jwb:
Labcd= (5x.4x)
80 cm²= 20x²
x²= 80 cm²/20
x²= 4 cm
x=√4 cm
x=2 cm
p : l : t = 5 : 4 : 3
maka cari satu satu:
- Panjang
P= 5(x)
P= 5(2)
P= 10 cm
- Lebar
P= 4(x)
P= 4(2)
P= 8 cm
- Tinggi
T= 2(x)
T= 2(2)
T= 4 cm
Maka:
Masukkan hasil yg didapat tadi
V. Balok
= p. l. t
= 10 cm . 8 cm . 6 cm
= 80 cm. 6 cm
= 480 cm²
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