Select from following answers:- 1 km/hr

- 1.5 km/hr
- 2 km/hr
- 2.5 km/hr
- All Above
Suppose he move 4 km downstream in x hours. Then,
Speed downstream = 4/x km/hr.
Speed upstream = 3/x km/hr.
48/(4/x) + 48/(3/x) = 14 or x = 1/2 .
So, Speed downstream = 8 km/hr, Speed upstream = 6 km/hr.
Rate of the stream = (1/2)*(8 - 6) km/hr = 1 km/hr.
Show Correct Answer
Asked In: Many Interviews |
Alert Moderator