Suatu balok dengan perbandingan panjang, lebar,dan tinggi 5:4:3, jika seluruh panjang rusuknya 96 cm. Volume balok tersebut adalah... cm3 A.380 B.420 C.480 D.520
Tolong bantuannya ya kawan beserta caranya . Thanks a lot friends
oktavina810
96 cm = (5y x 4) + (4y x 4) + (3y x 4) = 20y + 16y + 12y = 48y y =2 p=10 l=8 t=6
= 20y + 16y + 12y
= 48y
y =2
p=10 l=8 t=6
v= 10 x 8 x 6
=480 (C)
l = 4n
t = 3n
panjang rusuk seluruhnya = 4(p + l + t)
96 = 4(5n + 4n + 3n)
96 = 4(12n)
96 = 48n
n = 2
jadi, : p = 5n = 5.2 = 10
l = 4n = 4.2 = 8
t = 3n = 3.2 = 6
volume = p.l.t
= 10.8.6
= 480 cm³ (C)