no 26 tuh cara nya kaya apa ya saya cari gak dapat

● SOLUTIONS ●

Panjang kawat
= 3 × K kolam
= 3 × {(72°/360° × 2 × π × r) + (2 × r)}
= 3 × {(72°/360° × 2 × 3,14 × 10 m) + (2 × 10 m)}
= 3 × {(1/5 × 62,8 m) + 20 m}
= 3 × (12,56 m + 20 m)
= 3 × 32,56 m
= 97,68 m