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A car travels a total distance of 150 km. At the 50-minute mark, the car has travelled 50 km and at the 110-minute mark,

A car travels a total distance of 150 km. At the 50-minute mark, the car has travelled 50 km and at the 110-minute mark, the car has travelled 120 km. Find the average velocity in metres per second of the car between the 50-minute mark and the 110-minute mark.

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