A man rows to a place 48 km distant and come back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is:
Answer: Option A
Suppose he move 4 km downstream in x hours. Then,
|Speed downstream =||4||km/hr.|
|Speed upstream =||3||km/hr.|
|48||+||48||= 14 or x =||1||.|
So, Speed downstream = 8 km/hr, Speed upstream = 6 km/hr.
|Rate of the stream =||1||(8 – 6) km/hr = 1 km/hr.|