Dari suatu balok diketahui panjang 5xcm, lebar 3xcm, tinggi 4xcm . Jika volume balok tersebut =480 cm.3 . Tentukan : a. Panjang, lebar, tinggi balok B. Luas balok tersebut
Abidah
A. V = p x l x t 480 = 5x . 3x . 4x 480 = = = 8 = x = 2 panjang = 5x = 5(2) = 10cm lebar = 3x = 3(2) = 6cm tinggi = 4x = 4(2) = 8cm
b. Luas permukaan = 2 (pl + pt + lt) = 2 (10.6 + 10.8 + 6.8) = 2 (60 + 80 + 48) = 2 (188) = 376 cm2
480 = 5x . 3x . 4x
480 =
=
= 8
=
x = 2
panjang = 5x = 5(2) = 10cm
lebar = 3x = 3(2) = 6cm
tinggi = 4x = 4(2) = 8cm
b. Luas permukaan = 2 (pl + pt + lt)
= 2 (10.6 + 10.8 + 6.8)
= 2 (60 + 80 + 48)
= 2 (188)
= 376 cm2