September 2018 2 90 Report
Diketahui keliling persegi sama dengan 2 kali keliling persegi panjang. Jika luas persegi 256 cm2, sedangkan panjang persegi panjang 9cm, maka lebar persegi panjang tersebut adalah...
a. 8cm, b. 7cm, c. 6cm, d. 5cm

Tolong jawab pakai cara ya!! :)
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