Two travelers, "P" and "Q," set out on a journey from point "X" to point "Y." Their travel speeds were in the ratio of 4:5. "P," using the metro, completed the journey in 25 hours, whereas "Q," who traveled by bus, faced a 3-hour delay due to traffic lights and took "h" hours to finish. Given that "Q" moves 10 km/hr faster than "P," find the value of "h."