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Sebuah kotak yang terdiri bahan kertas, berukuran 20cm, lebar 15 cm dan tingginya 6 cm. luas kotakyang diperlukan untuk membuat 7 kotak adalah ... cm2

Rani Maharani

Soal

Pembahasan

Jawaban:

    7 kotak × (2 × (20 × 15) + 2 × (20 × 6) + 2 × (15 × 6)) cm²
    = 7 × (600 + 240 + 180) cm²
    = 7 × 1020 cm²
    = 7140 cm²

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