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Lp = 2(pl + pt + lt)
= 2(24 × 18 + 24 × 12 + 18 × 12)
= 2(432 + 288 + 216)
= 2 × 936
= 1.872 cm²
Jawabannya C
10).
Lp = 2πr(r + t)
= 2 × 3,14 × 30 (30 + 30)
= 188,4 × 60
= 11.304 cm²
Jawabannya A
no 9 kurang tau maaf