Jawabanmu

2014-04-15T22:06:27+07:00
V = p x l x t
= 5p x3p x 2p
= 30p^3
= p^3 = 810 : 30
= 27 p = 3 x 5=15

l = 3 x 3 =9
t = 2 x 3 = 6

Luas = 2(pl+pt+lt)
= 2 (15x9 + 15x6 + 9x6)
=
2 ( 135 + 90 + 54 )
= 2 (279)
=558

Jadi luas permukaan balok tersebut 558