Abus leaves city mm and travels to city nn at a constant speed, at the same time another bus leaves city nn and travels to city mm at the same constant speed. after driving for 2 hours they meet at point pp. the following day the buses do the return trip at the same constant speed. one bus is delayed 24 minutes and the other leaves 36 minutes earlier. if they meet 24 miles from point pp, what is the distance between the two cities?