Perbandingan panjang rusuk suatu balok berVolume 1120 cm³ adalah 4:5:7. Maka luas permukaan baloknya adalah?????

rusuk 1=4x
rusuk 2=5x
rusuk 3=7x

V=p*l*t
1120=4x*5x*7x
1120=140x³
x³=8
x=2

maka rusuk2nya= 8, 10, 14
LSP= 2(pl+lt+pt)= 2(80+140+112)=2 *332=664cm^2

³
V = p x l x t
1120 = 4x x 5x x 7x
1120 = 140x³
1120 / 140 = x³
8 = x³
2 = x

p = 4x = 4x2 = 8
l = 5x = 5x2 = 10
t = 7x = 7x2 = 14

L = 2 (pxt + pxl + lxt)
L = 2 (8x14 + 8x10 + 10x14)
L = 2 (112 + 100 + 140)
L = 2 (332)
L = 664 cm²

Semoga Membantu