Two persons start walking together towards each other from A and B, who are 60 km apart. They met after 5 hours. After their meeting, the first person, who traveled from A to B, reduced his speed by 1.5 km/h. Another person, who traveled from B to A, increased his speed by 1.5 km/h. The one who reaches B (the first person) reaches two and a half hours before the person who reaches A (the second person) then find the initial speed of the first person.

Answer

7.5 km/h