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p = 7/[7+7+5+5][rumus keliling persegi panjang] × 120
= 7/24 × 120
= 7/1 × 5
= 35
l = 5/24[sama] × 120
= 5/24 × 120
= 5/1 × 5
= 25
luas = p × l
= 35 × 25
= 875
terima kasih semoga membantu ^_^