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Verified answer
K < 260 cmp = l + 10 cm
K < 2 (p+l)
260/2 < l + 10 +l
130< 2 l + 10
2l + 10 < 130
2l < 130 - 10
l < 120/2
l < 60 cm
p < l + 10 < 60 +10 < 70 cm
p maksimum 70 cm dan l maksimum 60 cm