If the speed of a boat in still water is $12$ km/h and the stream speed is $3$ km/h, the upstream speed is:
Practice this question from Chapter Mock 9: Boat and Stream, with options and an explanation.
Question
If the speed of a boat in still water is $12$ km/h and the stream speed is $3$ km/h, the upstream speed is:
Option A
8 km/h
Option B — Correct answer
9 km/h
Correct choice.
Option C
12 km/h
Option D
15 km/h
Explanation
Upstream speed $=12-3=9$ km/h.