Distance between P and Q = 15 km Distance covered by Alok = PR Distance covered by Raman = PQ + RQ Total distance covered by both Raman and Alok = PR + PQ + RQ = PQ + PQ = 2PQ = 2 × 15 = 30 km From the figure. PR + RQ = PQ Speed of Raman and Alok is 9 km/hr and 6 km/hr respectively. As we know, Time = Distance/Speed Time = 30/(9 + 6) Time = 30/15 Time = 2 hr Distance covered by Alok in 2 hr = 6 × 2 = 12 km So, the distance between P and R is = 12 km