Downstream speed of a boat is $14$ km/h and upstream speed is $7$ km/h. The still-water speed is:
Practice this question from Chapter Mock 9: Boat and Stream, with options and an explanation.
Question
Downstream speed of a boat is $14$ km/h and upstream speed is $7$ km/h. The still-water speed is:
Option A
9 km/h
Option B
10 km/h
Option C — Correct answer
10.5 km/h
Correct choice.
Option D
11 km/h
Explanation
Still-water speed $=\frac{14+7}{2}=10.5$ km/h.