Jawab:
Penjelasan dengan langkah-langkah:
luas permukaan= 2×π×r×[r+t]
=2×22/7×7×[7+18]
=44+25=69 cm²
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Jawab:
Penjelasan dengan langkah-langkah:
luas permukaan= 2×π×r×[r+t]
=2×22/7×7×[7+18]
=44+25=69 cm²