The speed of a boat in still water is 25 km/hr. If the upstream speed of the boat is 19 km/hr, then what is the speed (in km/hr) of the stream?
Show answer & explanation
Correct answer: B
Explanation
Given:
Speed in still water = 25 km/h
Speed against the current (upstream) = 19 km/h
According to the formula:
Upstream speed = Speed of the boat − Speed of the current
19 = 25 − Speed of the current
Speed of the current = 25 − 19 = 6 km/h