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Short Tricks for Boat and Stream in Quant Section : SSC & Railway
Using basic math formula do first ten maths of that page. You also need to keep track of Timing. After solving all ten math questions write down total time taken by you to solve those questions. Now practice our shortcut tricks on boats and streams and read examples carefully. After this do remaining ten questions and apply shortcut formula on those math problems. Again keep track of Timing. This time you will surely see improvement in your timing.� In one hour a boat covers 8 km against the stream and 12 km along the stream. What would be the speed of the boat in still water? Advertisement. Solution: Downstream speed = Speed in still water + Speed of stream = 7 + 2 = 9 km/hr A couple more formulae, Formula 1: If the ratio of downstream and upstream speeds is D: U, then ratio of time taken will be U: D. Question: A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively? Solution: When 8 hours 48 minutes is written using mixed fractions, Therefore, the ratio of the time taken becomes Which on solving. Boats and Streams: Formulas, Tricks, Examples and Online Test. NEXT: Online Test Boats Streams Exercise. ????? ?????. Stream: It implies that the water in the river is moving or flowing. Upstream: Going against the flow of the river. Downstream: Going with the flow of the river. Still water: It implies that the speed of water is zero (generally, in a lake).� Boat�s speed in still water. = Example 1: A boat travels equal distance upstream and downstream. The upstream speed of boat was 10 km/hr, whereas the downstream speed is 20 km/hr. What is the speed of the boat in still water? Solution: Upstream speed = 10 km/hr. Downstream speed = 20 km/hr. As per formula, Boat�s speed in still water. = Therefore, Boat�s speed in still water. = = Speed of current.

Dear Reader, problems under boats and streams are not Speed Of Current Formula In Boat And Stream only easy to solve but interesting as well. In this tutorial, you will see 5 important types of problems.

At the end of the tutorial, you will find short online practice test. Let us begin the tutorial now. In this type, you will be finding speed of boat in still water i. You have to remember a very simple formula as shown below. Find the speed of the boat in still water.

Solution: From the question, you can write down the below values. You have to substitute the above values in the below formula. This type is similar to type 1. But there is one difference. Here you have to find speed of stream and not the speed of the boat. You have to use the below formula to find speed of stream. Example Question 2: A man rows downstream 30 km and upstream 12 km.

If he takes 4 hours to cover each distance, then the velocity of the current is:. Solution: In this question, downstream and upstream speeds are not given directly.

Hence you have to calculate them first. Step 3: Calculation of speed of stream You have to substitute values got in steps 1 and 2 in below formula to find the speed of the stream.

In this type, you have to find distance of places based on given conditions. Below example will help you to understand better. If in a river running at 2 km an hour, it takes him 40 minutes to row to a place and return back, how far off is the place? The man rows to a particular place and comes back. You have to calculate the distance of this place.

Let this distance be X. See the below diagram to understand clearly. Man starts from A, travels to B and comes back. Therefore, above equation becomes,. Also we have calculated downstream and upstream speeds at the start see values 1 and 2. In question, you can see that the man takes 40 minutes to travel to B and come back to A. You have to convert this to hours and apply in above equation. We are converting from minutes to hours because we are using speed values in km per hour units.

It takes him twice as long to row up as to row down the river. Find the rate of the stream. Solution: Step 1: Calculate upstream and downstream speeds. Based on our assumptions, you can easily calculate upstream and downstream speeds as shown below. In this type, you have to form linear equations based on conditions given. You have to solve those equations to find the answer. Example Question 5: Kavin can row 10 km upstream and 20 km downstream in 6 hours. Also, he can row 20 km upstream and 15 km downstream in 9 hours.

Find the rate of the current and the speed of the man in still water. Solution: You have to make below assumptions to form equations. You already know the below equation. If you are not clear about this, refer to the equation in type 3. Note: To solve such linear equations, there is another simple shortcut. Here is the video link to that shortcut. From the values of u and v, you can find the downstream and upstream speeds as shown below. Also, you know the formula for speed of the current.

Ready for short practice test? Start Test Here. You can type your doubts in the comments section below. You can also suggest improvements to the above tutorial. Homepage Tutorials. Tags: Boats and Streams Problems.

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