Jawabanmu

2014-04-22T20:13:37+07:00
P=L:l=24:4=6cm.......……………………… Lp=2*Lalas+(KllAlas*t)................. =2*24+(20*10)=48+200=248
2014-04-22T20:13:58+07:00
L alas = p x l
24= p x 4
24/4 = p
6 cm= p
Lp = (2 x L alas) + ( 2 x p x t) + (2 x l x t)
= ( 2 x 24) + (2 x 6 x 10) + (2 x 4 x 10)
= 48 + 120 + 80
= 248 cm^2