Ashu and Manoj will meet for the first time at C which is 300 m from B as Ashu will cover 500 m and Manoj 300 m because the ratio of their speeds is 5: 3. Now Manoj will change his direction and hence both will start running towards B. Ashu will return back towards A after reaching B and meet Manoj at D. Therefore
CB+DB
CD
=
300+x
300−x
=
5
3
⇒x=75m Again Manoj will change his direction and both will start running towards A. To reach A, Ashu has to cover 725 m. In the same time Manoj will cover725×
3
5
=435m. So Manoj will be 75 + 435 = 510 m from B when Ashu reaches A.