Question 21
Bailey is a wedding planner and she owns 3 rugs. When she spreads them separately, they cover a total area of 100 m². One day, Bailey needs to hold an event with floor area of 70 m². She overlaps three rugs to cover all the floor. Then, Bailey notices that the area which is covered by exactly two layers of rug is 12 m². What area of floor is covered by three layers of rug? (unit: m²).
Editorial coverage assumption: all three rugs lie flat entirely within the floor, with no folding or overhang. Their union is exactly the floor.
Editorial coverage assumption: all three rugs lie flat entirely within the floor, with no folding or overhang. Their union is exactly the floor.