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= (7 × 4cm) + (6 + 8 + 10)
= 28cm + 24cm
= 52cm
4. keliling = (2 × 100) + (2 × 25)
= 200 + 50
= 250 m
Jadi andi harus mengeliling lapangan sebanyak = 4000m : 250m
= 16 kali
5. Keliling = (2 × 26) + (2×14)
= 52 + 28
= 80m
Jadi, jarak tempuh yang diperlukan adalah 80m × 3 = 240m
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