RBI Grade B Officers 21 Nov 2015 Paper

Boat A travels upstream from point X to point Y in 2 hours more than the time taken by Boat B to travel downstream from point Y to point Z. The distacne between X and Y is 40 km and that distance between Y and Z is 24 km. The speed of Boat B in still water is 10 km/h and the speed ofBoat A in still water is equalto the speed of Boat B downstream.What is the speed ofBoat A in still water? (Considerthe speed of the currentto be the same).