Question

Diketahui perbandingan panjang, lebar, dan tinggi balok 4 : 3 : 2. Jika jumlah panjang rusuk balok 72 cm, volume balok adalah....

Answer 1

P : l : t
4 : 3 : 2
4y : 3y : 2y

72 = 4(4y + 3y + 2y)
72 = 4(9y)
72 = 36y
72 : 36 = y
2 = y

p = 4y = 4 x 2 = 8 cm
l = 3y = 3 x  2= 6 cm
t = 2y = 2 x 2 = 4 cm

V = p x l x t
V = 8 x 6 x 4
V = 192 CM^3

Answer 2

Kragka = 4 ( 4a + 3a + 2a)
72    = 4 ( 9a)
72    = 18a
72/18 = a
   4    = a
pajang = 4 x 4 = 16
lebar = 3 x 4 = 12
tinggi = 2 x 4 = 8

volume = p x l x t
           = 16 x 12 x 8
           = 1536 cm³


jawabnnya 1536 cm³