1.

1). 10 m/hr2). 5 m/hr3). 12 m/hr4). 6 m/hr

Answer»

Let the speed of current be x m/hr.

Speed of boat in still water = 60 m/hr

Speed of boat travelling upstream = (60 - x) m/hr

Time TAKEN to travel 10 m upstream = 10/(60 - x) hr

Speed of boat travelling downstream = (60 + x) m/hr

Time taken to travel 15 m downstream = 15/(60 + x) hr = 10/(60 - x) hr (GIVEN)

⇒ 900 - 15x = 600 + 10x

25X = 300

⇒ x = 12 m/hr

∴ Speed of current is 12 m/hr



Discussion

No Comment Found

Related InterviewSolutions