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2p+ 2l ≤ 52
p + l ≤ 26
3l - 2 + l ≤ 26 (p = 3l - 2)
4l ≤ 28
l ≤ 7
l = {7,6,5,...}
p + l ≤ 26
p + 7 ≤ 26
p ≤ 19
p = {19,18,...}
Untuk memperoleh luas yang maksimum, maka nilai panjang dan lebar harus yang maksimum. Maka :
Luas maksimum = p x l
= 19 x 7
= 133
Semoga membantu
K ≤ 2(p + l)
52 ≤ 2((3l - 2) + l)
26 ≤ (3l - 2) + l
26 ≤ 3l - 2 + l
26 + 2 ≤ 3l + l
28 ≤ 4l
7 ≤ l
p = 3l - 2
= 3(7) - 2
= 21 - 2
= 19 cm
l = 7 cm
L = p × l
= 19 cm × 7 cm
= 133 cm²
Semoga membantu ^-^