Penjelasan dengan langkah-langkah:
LP: 2xphixr (r+t)
: 2x3,14x15 (15+20)
: 3297 cm²
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Penjelasan dengan langkah-langkah:
LP: 2xphixr (r+t)
: 2x3,14x15 (15+20)
: 3297 cm²