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Boats and Streams Tips and Tricks for Government Exams

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00:00Quantitative Aptitude
00:45FORMULA
05:59What will be the boat's speed in still water and speed of river, if the boat takes 12 hours to row 48 km upstream and 8 hours to row the same distance downstream?
09:13Simran takes twice as long to swim up as to swim down the river and has a speed of 12 km/hr in still water. What is river's speed?
11:27it takes P 1 hour to row to a place and to come back. If the river is running at 2.4 km/hr and P has a speed of 12 km/hr in still water, what distance is the place from P's starting point?
15:10An ocean current flows at a rate of 1.5 km/hr. A shark can swim in still water at the rate 4.5 km/hr. What is the average speed for the entire distance travelled, if the shark swims from India to Australia and comes back?
18:31Ajay takes 4 hours more while swimming upstream than downstream. His speed in still water is 10 km/hr. The speed of stream is 2 km/hr. What is the distance?
21:05Raj swims 26km downstream in same time as 14 km upstream. What is his speed in still water if speed of stream is 3km/hr?
23:01Ratio of Guddi's swimming speed in still water to the speed of river is 7:1. She swims 4.2 km up the river in just 14 min. How much time will Guddi take to swim 18.4 km down the river?
26:14Find the ratio of swimming speed of Raj in still water to speed of river, if ratio of time taken to go 10km upstream to time taken to go 10km downstream is 11:5?
28:43km upstream. But he takes 6 hours to swim 36 km downstream and 24 km upstream. At what rate is the river flowing?
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FAQs on Boats and Streams Tips and Tricks for Government Exams

1. What is the concept of boats and streams in mathematics?
Ans. Boats and streams is a concept in mathematics that deals with the relative speed of a boat or a swimmer in still water and the speed of a stream or a river. It involves solving problems related to the speed of the boat or swimmer when moving in the same direction as the stream, against the stream, or across the stream.
2. How do you calculate the speed of a boat or swimmer in still water using boats and streams concept?
Ans. To calculate the speed of a boat or swimmer in still water, we need to consider the time taken by the boat or swimmer to travel a certain distance in both the directions (with the stream and against the stream). By using the formula: speed in still water = (speed with the stream + speed against the stream) / 2, we can find the speed in still water.
3. Can you explain the concept of downstream and upstream in boats and streams?
Ans. In boats and streams, downstream refers to the direction in which the stream is flowing. When a boat or swimmer moves in the same direction as the stream, it is called downstream. On the other hand, upstream refers to the direction opposite to the flow of the stream. When a boat or swimmer moves against the stream, it is called upstream.
4. How can boats and streams concept be applied to real-life scenarios?
Ans. The concept of boats and streams can be applied to real-life scenarios such as calculating the effective speed of a boat while traveling in a river, determining the time taken by a swimmer to cross a river, or calculating the speed at which a boat or swimmer should move in order to reach a destination in a given time when there is a stream or river involved.
5. Are there any specific strategies or formulas to solve boats and streams problems effectively?
Ans. Yes, there are certain strategies and formulas that can help solve boats and streams problems effectively. These include understanding the concept of relative speed, using the formula speed in still water = (speed with the stream + speed against the stream) / 2, and applying the concept of time, distance, and speed to the given problem. Practice and familiarity with different scenarios will also improve problem-solving abilities in boats and streams.
Video Timeline
Video Timeline
arrow
00:00Quantitative Aptitude
00:45FORMULA
05:59What will be the boat's speed in still water and speed of river, if the boat takes 12 hours to row 48 km upstream and 8 hours to row the same distance downstream?
09:13Simran takes twice as long to swim up as to swim down the river and has a speed of 12 km/hr in still water. What is river's speed?
11:27it takes P 1 hour to row to a place and to come back. If the river is running at 2.4 km/hr and P has a speed of 12 km/hr in still water, what distance is the place from P's starting point?
15:10An ocean current flows at a rate of 1.5 km/hr. A shark can swim in still water at the rate 4.5 km/hr. What is the average speed for the entire distance travelled, if the shark swims from India to Australia and comes back?
18:31Ajay takes 4 hours more while swimming upstream than downstream. His speed in still water is 10 km/hr. The speed of stream is 2 km/hr. What is the distance?
21:05Raj swims 26km downstream in same time as 14 km upstream. What is his speed in still water if speed of stream is 3km/hr?
23:01Ratio of Guddi's swimming speed in still water to the speed of river is 7:1. She swims 4.2 km up the river in just 14 min. How much time will Guddi take to swim 18.4 km down the river?
26:14Find the ratio of swimming speed of Raj in still water to speed of river, if ratio of time taken to go 10km upstream to time taken to go 10km downstream is 11:5?
28:43km upstream. But he takes 6 hours to swim 36 km downstream and 24 km upstream. At what rate is the river flowing?
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