Two cars (x and y) leave in the same direction. The car x leaves with a constant speed of 60 km/h and the car y leaves with a constant speed of 90 km / h. In one hour (60 minutes) the car y can get a distance of 30 kilometers from the x car, in other words, it can get away one kilometer for each 2 minutes. Read the distance (in km) and calculate how long it takes (in minutes) for the car y to take this distance in relation to the other car.
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