Two rabbits start running towards each other one from A to B and another from B to A.They cross each other after one hour and the first rabbit reaches B,5/6 hour before the second rabbit reaches A.If the distance between A and B is 50km.What is the speed of the slower rabbit?

a.20kmph b.10kmph c.15kmph d.25kmph e.none of these

kindly provide solution for the above problem