Question

Perbandingan panjang,lebar,tinggi balok berturut2 adlh 4:3:2. jika luas permukaan balok 468 cm³,hitunglah ukuran balok tsb!
tolong dong...

Answer 1

468 = 2 (4y x 3y + 4y x 2y + 3y x 2y )
468 = 2 (12y^2 + 8y^2 + 6y^2 )
468 = 2 x 26y^2
468 = 52 y^2
468/52 = y^2
9 = y^2
3 = y

ukuran balok
panjang = 4x3 = 12
lebar = 3x3 = 9
tinggi = 2x3 = 6

maaf kalo salah

Answer 2

Lp = 2 ( p.l + p.t + l.t)
468 = 2 ( p.l + p.t + l.t)
( p.l + p.t + l.t) = 234
12 x² + 8x² + 6x² =234
26 x² = 234
x² = 9
x = 3
jadi,
panjang = 4x = 4(3) = 12
lebar = 3x = 3(3) = 9
tinggi = 2x = 2(3) = 6