Harus pake cara gw suruh jawab di sini ya bukan suruh di wa
Penjelasan dengan langkah-langkah:
lp = 2 ( pl + lt + pt )
lp = 2 × ( 30 × 20 + 20 × 10 + 30 × 10 )
lp = 2 × ( 600 + 200 + 300 )
lp = 2 × 1.100
lp = 2.200cm²
SOAL 1
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Rumus :
L Kertas Kado = 2 × (PL + PT + LT)
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L Kertas Kado = 2 × [(30 . 20) + (30 . 10) + (20 . 10)]
L Kertas Kado = 2 × [600 + 300 + 200]
L Kertas Kado = 2 × [600 + 500]
L Kertas Kado = 2 × 1.100
L Kertas Kado = 2.200 cm²
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