- A14 hours
- B10.5 hours
- C12 hours
- D21 hours
Step-by-Step Solution
Downstream speed = km/h, so boat = km/h. Upstream = km/h. Time = h.
Answer: A) 14 hours
The stream flows at 4 km/h. A boat covers 84 km downstream in 6 hours. How long will it take to cover the same 84 km upstream?
Competition practiceBoats & Streams
Master this topic in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Boats & Streams practice questions
More Boats & Streams practice
A log floating freely drifts 9 km in 3 hours. A boat whose speed in still water is 12…In the figure, the boat covers the 66 km from A to B in 3 hours. How long will it take…The boat in the figure goes from A to B in 3 hours. How long will it take to come back…The stream's speed is one-fourth of a boat's still-water speed. The boat goes 30 km…Over one stretch of river a boat needs 9 hours upstream but only 6 hours downstream.…