The speed of a swimmer downstream is 23km/h. If the speed of the swimmer upstream is 14 km/h, then what is the speed of the stream?
Show answer & explanation
Correct answer: C
Explanation
The Correct answer is option 3 i.e 4.5 km/h.
The speed of a swimmer downstream = 23 km/h
The speed of the swimmer upstream = 14 km/h
The speed of the stream =
(The speed of a swimmer downstream - The speed of the swimmer upstream)/2
= (23 - 14)/2
= 4.5 km/h