IKMC 2027 - Grades 7-8 - Self-study SET 7 - Thematic Batch 3 Question 21

Ann, Boris and Basil finish a race. They start together and each runs at a constant speed. When Ann finishes, Boris has 15 m left and Basil has 35 m left. When Boris finishes, Basil still has 22 m left. How long is the race?