Jawabanmu

2014-04-23T17:02:05+07:00
Dik:
perbandingan panjang, lebar, tinggi 5:3:2
v = 810³

Dit:
Luas permukaan balok?

jwb:

v = p . l . t
810 = 5x . 3x . 2x
810 = 30x³
27  = x³
3   = x

panjang =  3(5) = 15 cm
lebar = 3(3) = 9 cm
tinggi = 3(2) = 6 cm

Lp = 2 x (lp + lt + pt)
Lp = 2 x ((15.9) + (9.6) + (15.6)
Lp = 2 x (135 + 54 + 90)
Lp = 2 x (279)
Lp = 558 cm²

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