Jawabanmu

2014-04-14T20:12:52+07:00
7m = 700 cm
panjang = 13 × 4 = 52 cm
lebar = 10 × 4 = 40 cm
tinggi = 7 × 4 = 28 cm

5 kerangka = 5 × (52+40+28) = 5 × 120 = 600 cm

sisa kawat = 700-600 = 100 cm
2014-04-14T20:19:43+07:00
Panjang seluruh rusuk = 3 ( p + l + t )
= 3 (13 + 10 + 7)
= 3 ( 30 )
= 90 . 5 = 450cm

Kawat - Panjang seluruh rusuk = 700 - 450 = 250cm

Sisa kawat adalah 250cm