Tolong kak bantuin saya menjawab soal yang nomor 5

panjang (p) = 2x; lebar (l) = 5x; tinggi (t) = 3x
Jumlah panjang rusuk = 0.8 m

4p + 4l + 4t = jumlah panjang rusuk
4(2x) + 4(5x) + 4(3x) = 0.8 m
8x + 20x + 12x = 0.8 m
40x = 0.8 m
x =0.02 m = 2 cm

p = 2x = 2(2) = 4 cm
l = 5x = 5(2) = 10 cm
t = 3x = 3(2) = 6 cm

Luas permukaan (Lp) = 2 (pl + pt + lt)
Lp = 2[(4)(10) + (4)(6) + (10)(6)]
Lp =2(40 + 24 + 60)
Lp =2(124)
Lp = 248 [tex] cm^{2} [/tex] = 0.248 [tex] m^{2} [/tex]