luas permukaan balok 376cm2. panjang 10cm dan lebar 8cm. volumenya?

Diket :
L.perm.balok = 376 cm²
p = 10 cm, l = 8 cm

Ditanya : V. balok ?

Dijawab :
L.perm.balok = 376 cm²
2 (p x l) + 2 (p x t) + 2 (l x t) = 376
2 (10 x 8) + 2 (10 x t) + 2 (8 x t) = 376
2 (80) + 2 (10t) + 2 (8t) = 376
160 + 20t + 16t = 376
160 + 36t = 376
36t = 376 - 160
36t = 216
t = 216/36
t = 6 cm

Volume balok
= p x l x t
= 10 x 8 x 6
= 80 x 6
= 480 cm³

Jadi, volume balok tsb adalah 480 cm³

lp balok = 2 ( p×l + p×t + l+t)
376 = 2 (10×8 + 10×t + 8×t)
376 = 2 (80 + 10 t + 8t)
376 = 160 +20t + 16t
376 = 160 + 36t
36t = 376-160
36t = 216
t = 216 ÷ 36
= 6
*** v balok= p × l × t
= 10 × 8 × 6
=480