SSC CPO Tier 1 Exam 27 June 2024 Shift 1

Sally drives a mini school bus. She starts at the school gate and drives 7 km north for her first pick-up. She then turns right and drives 10 km picking up children along the way. She takes another right turn and drives 5 km. She then takes a final right to return to the school. How far would Sally need to drive to reach back to the school gate again?