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2014-05-19T19:50:59+07:00
P = 20
l = 15
kelililg
 2(p+l)
2 ( 20 + 15 )
2 ( 35 )
70 CM

1 5 1
2014-05-19T19:52:51+07:00
L = p.l
300 = 4x . 3x
300 = 12x^2
25 = x^2
x = 5
a) p = 4x = 20
    l = 3x = 15
b ) K = 2(p+l) = 2 (35) = 70