Question 3
A conveyor belt connects two platforms of a subway. If we are just standing still on the belt, the journey from one end of the belt to the other end lasts 120 seconds. Walking normally at a constant speed, outside the conveyor belt, the journey from one end of the belt to the other end lasts 180 seconds. How many seconds would it take to travel from one end to the other end of the conveyor belt in the same direction if you walk normally on the conveyor belt, with the same speed at which we walked outside to the conveyor belt?