tolong d jawab kak, pliss

Panjang busur
= 120°/360° × Keliling lingkaran
= 1/3 × 2πr
= 1/3 × 2 . 22/7 . 42
= 1/3 × 264
= 88 m

Kawat 1 putaran = 88 m + 42 m + 42 m = 172m

Kawat 4 putaran = 172 m × 4
= 688 m (A)