Speed of a boat in still water is 18 km/hr. Speed of stream is 15 km/hr. What is the upstream speed (in km/hr) of the boat?
Show answer & explanation
Correct answer: C
Explanation
Given:
Speed in still water = 18 km/h
Speed of the stream = 15 km/h
According to the formula:
Upstream speed = Speed in still water − Speed of the stream
Upstream speed = 18 − 15 = 3 km/h