A man can row downstream at a speed of 15 km/h and upstream at 11 km/h. Find his speed in still water and the speed of the current, respectively. [Give both your answers in km/h]
Answer & explanation
Correct answer: option 3
We know that,
Upstream Speed = Speed of Boat – Speed of current
Downstream Speed = Speed of Boat + Speed of current
Given,
Downstream = 15 km/h
Upstream = 11 km/h
Upstream = Speed of the man - Speed of the stream = 11
Downstream = Speed of the man + Speed of the stream = 15
So,
2 × Speed of the man = 26
= Speed of the man = 13
So, speed of stream = 2
Answer = 13, 2