diketahui perbandingan panjang ,lebar,dan tinggi suatu balok 6:4:5 .jiak voulme balok 7.680 cm^3 .tentukan luas balok

Bangun Ruang Sisi Datar.

V = plt
7680 = (6x)(4x)(5x)
120x³ = 7680 → x = 4

p = 6x = 6(4) = 24 cm
l = 4x = 4(4) = 16 cm
t = 5x = 5(4) = 20 cm

L = 2(pl + pt + lt)
   = 2 [(24 cm)(16 cm) + (24 cm)(20 cm) + (16 cm)(20 cm)] = 2368 cm²