Question
A swimmer swims from a point A against a current for 12 minutes and then swims backwards in favour of the current for next 12 minutes and comes to the point
A swimmer swims from a point A against a current for 12 minutes and then swims backwards in favour of the current for next 12 minutes and comes to the point
B. If AB is 200 metres, the speed of current (in km per hour) is
OA = distance covered by upstream speed in 12 minutes = 12/60 (x – y ) OB = distance covered by downstream speed in 12 minutes = 12/60 (x + y ) According to the question, OB – OA = AB 12/60 (x + y ) - 12/60 (x - y ) = 200/1000 1/5 (x + y - x + y) = 200/1000 2y = 2/10 × 5 y = 0.5 km/hr. Speed of current = 0.5 km/hr.More Boats and streams Questions
- If a river is flowing at a rate of 6 km/hr and a boat's speed in still water is 100% higher than the river's speed, and the boat travels 'd' kilometers dow...
- A boat travels 30 km downstream in 2 hours and the same distance upstream in 5 hours. Find the speed of the boat in still water and the speed of the stream...
- The boat's downstream and upstream speeds are 24 km/hr and 16 km/hr respectively. If the time taken to cover a distance of (x + y) km upstream with stream ...
- The speed of a boat in still water increases by 4 km/hour after each hour. The speed of stream is 3 km/hour. If the boat travelled 60 km in 3 hours in down...
- The speed of a boat in still water is 30 km/hr. If the boat covers 160 km in upstream in 8 hours, then find the time taken by the boat to travel 160 km in ...
- A man’s speed with the current is 18 km/hr and the speed of the current is 7 km/hr . The man’s speed against the current is:
- If the sum of upstream and downstream speed is 20 km/hr and the speed of the current is 5 km/hr. Then find time taken to cover 45 km in downward?
- A boy can swim a certain distance downstream in 4 hours and return in 5 hours. If the rate of stream is 3 kmph then what is the speed of boy in still water...
- Ramu can row 12 km/hr. in still water. It takes him twice as long to row up as to row down. Find the rate of the stream.
- A boy can swim a certain distance downstream in 5 hours and return in 7 hours. If the rate of stream is 4 kmph then what is the speed of boy in still water...
Relevant for Exams:
Hey! Ask a query
Please enter email id
The email must be a valid email address.
Please enter Mobile Number
Please enter valid Mobile Number
Please enter your Doubt
Think You're Ready for RBI Grade B?
RBI Grade B 2026 Phase 1 Memory Based Paper
- 200 Questions with Detailed Solutions
- Section-wise Coverage (GA, English, Quant & Reasoning)