The speed of car A is y kmph less than that of B. The time taken by car A to cover the 120 km distance is 1 hour more than the time taken by car B to cover the same distance. When car B increases his speed by 10 kmph, both the persons are 160 km apart and moving in opposite directions, then they meet after 2 hours. Find the speed of car A. (Note: Speed of car A and car B are less than 100 kmph)