Rohit and Riya started walking toward each others from X and Y at the speed of 14 km/hr and 10 km/hr respectively. Rohit had walked 625 m more than Riya. Find the distance between A and B.

3.75 km

               x  ⇐               ⇒ y

Rohit →  14 km/h            Riya → 10 km/h

              ⇒                     ⇐

Let both travelled for x hours

Distance covered by Rohit = 14 x

Distance covered by Riya = 10 x

14 x - 10 x = .625

           4 x = .625

              x = .15625 h

Distance covered by Rohit = 14 x = 14   × .15625

                                      = 2.1875

Distance covered by Riya = 10x = 10 × .15625

                                     = 1.5625

Total distance between A & B = 2.1875 + 1.5625

                                           = 3.75 km