15. The distance between locations A and B is 70 kilometers. Two cars start from the two locations simultaneously and continuously travel back and forth between A and B. The first car departs from A, traveling at 30 kilometers per hour, and the second car departs from B, traveling at 40 kilometers per hour. When the first car, which departed from A, meets the second car after its second departure from A, the two cars have traveled $\qquad$ kilometers and $\qquad$ kilometers, respectively.
$15.150,200$