Multiple choice

The speed of a boat in still water is 5km/hr. If the speed of the boat against the stream is 3 km/hr, what is the speed of the stream?

  1. 1.5 km/hr

  2. 2 km/hr

  3. 2.5 km/hr

  4. 1 km/hr

  5. 3km/hr
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Speed of boat = 5 km/hr. Speed against stream = Boat speed - Stream speed. 3 = 5 - Stream speed. Stream speed = 2 km/hr.

AI explanation

Using the upstream speed formula, the speed of the boat against the stream equals the still water speed minus the stream speed. Given the still water speed of 5 km/hr and the upstream speed of 3 km/hr, we set up 5 - s = 3. Solving for s gives a stream speed of 2 km/hr.

Keep practicing — related questions