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Verified answer
Selisih jalan kaki dan sepeda= 110° - 90
= 20°
= 12 orang
menggunakan motor
= 360° - (50° + 110° + 90° + 80°)
= 360° - 330°
= 30°
= 30° / 20° × 12
= 3/2 × 12
= 18 orang ( A)