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A man went downstream for 28 km in a motor boat and immediately returned. It took the man twice as long to make the return trip. If the speed of the river flow were twice as high, the trip downstream and back would take minutes. Find the speed of the boat in still water and the speed of the river flow. A man can row 6 kmph in still water. When the river is running at 1. What is the total distance traveled by the man? A boy can swim in still water at 4. The speed of the stream is?
It takes him twice as long as to row down. Find the rate of stream of the river? By componendo and dividendo. Share this article. Member since Aug Shruti Kulkarni Jun 19, Report. Very important topic but is explained in nice way. Saurabh Ghanghoriya Aug 11, Report. Thanx ma'am. Saumya Sen Aug 13, Report. Devendra Singh Aug 13, Report.
Mam weekly or Boat And Stream Problems Class 10 List Pdf monthly kaun see current tyar kre grade up ki kyoki for ssc nd ntpc plz suggest. Nirmal Rai Dec 28, Report. Where can we download the pdf of this topic covered. Prashant Kumar Yadav Jan 1, Report. Please in hindi. Kaptan Jan 6, Report. Janardan Jan 28, Report. Related Posts. 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,.
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