Boats & Streams · Question 22 · Medium
A river flows at 3 km/h. A boat takes 4 hours to go 48 km downstream. How long will it take to return the same distance upstream?
- 8 hours
- 12 hours
- 5 hours
- 6 hours
Answer and explanation
Answer: A. 8 hours
Explanation: Downstream speed = 48 ÷ 4 = 12 km/h, so still-water speed = 9 km/h and upstream speed = 6 km/h. Time = 48 ÷ 6 = 8 hours.
Previous: A boat covers 40 km downstream and 24 km upstream in 8 hours. It also covers… · Next: A motorboat with a still-water speed of 15 km/h goes 30 km downstream and…
Practise boats & streams
Try a fresh set of boats & streams questions with an explanation after every answer, free and without signing up: Boats & Streams practice. Or sit a full placement mock test.
More boats & streams questions
- A swimmer covers 2 km downstream in 15 minutes. If the current flows at 2…
- A boat's downstream speed is 1.5 times its upstream speed. If its upstream…
- A boat covers 40 km downstream and 24 km upstream in 8 hours. It also covers…
- A motorboat with a still-water speed of 15 km/h goes 30 km downstream and…
- Ishaan rows to a ghat 30 km away and back in 8 hours. He finds he can row 5 km…
- Two ferries start at the same time from ghats X and Y, 60 km apart on a river…
- Rowing against the current, Kiran covers 1 km in 10 minutes. Rowing with the…
- A boat takes 2 hours to cover a certain distance downstream and 3 hours to…
- A boat goes downstream from A to B and then comes back upstream to C, which is…
- A motorboat leaves a pier going downstream; at the same moment a log starts…
More quantitative aptitude practice
Permutation & Combination · Probability · Data Interpretation · Mensuration · Algebra & Equations · Number System · HCF & LCM · Simplification
LogicWiz Exams home · All practice topics · Placement mock tests · Daily 10 challenge