bantu besok dikumpulin pliss
Jawaban:
Bangun ruang:
soal:
.
1. luas permukaan = 2 × (p×l) + (p×t) + (l×t)
= 2 × (12,5×9,5) + (12,5×24) + (9,5×24)
= 2 × (118.75 + 300 + 228)
= 2 × 646.75
= 1,293.5
.
.
2. luas permukaan = 6 × s × s
= 6 × 20,5 × 20,5
= 2,521.5
.
.
.
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