p = 15 cm
l = 10 cm
t = 20 cm
Luas permukaan
= 2 × ((p × l) + (p × t) + (l × t))
= 2 × ((15 × 10) + (15 × 20) + (10 × 20)
= 2 × (150 + 300 + 200)
= 2 × 650
= 1.300 cm² ❲c.❳
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p = 15 cm
l = 10 cm
t = 20 cm
Luas permukaan
= 2 × ((p × l) + (p × t) + (l × t))
= 2 × ((15 × 10) + (15 × 20) + (10 × 20)
= 2 × (150 + 300 + 200)
= 2 × 650
= 1.300 cm² ❲c.❳