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02.04.2021, adminThe direction along the stream in water is called downstream. The direction against the stream in water is called upstream. Problem 1 :. The speed of a boat in still water is 10 miles per hours. If it can travel 26 miles downstream and 14 miles upstream in the same time, find the speed of the current. Solution :.
Let "x" be the speed of the current. The formula to find the time :. We can use the above formula and find time downstream and time upstream as given below. Given : I t can travel 26 miles downstream and 14 miles upstream in the same time. Then, we have.
Take reciprocal on both sides. So, the speed of the current is 3 mph. Problem 2 :. A man can row 18 kmph in still water. It takes him thrice as long as to row up as to row down the river. Find the rate of current in kmph.
Let "x" be the rate of current. Let us assume that the man travels kms. Given : It takes him thrice as long as to row up as to row down the river. So, we have. So, the rate of current is 9 kmph. Problem 3 :. A boat takes 19 hours for traveling downstream from point A to point B and coming back to a point C midway between A and B. If the speed of the current is 4 kmph and the speed of the boat in still water is 14 kmph, what is the distance between A and B?
From the given information, we have. Let "x" be the distance between A and B. M of 18, 20 is Multiply both sides by Divide both sides by So, the distance between A and B is km. Problem 4 :. A boat covers 24 miles upstream Upstream And Downstream Questions Class 8 and 36 miles downstream in 6 hours while it covers 36 miles upstream and 24 miles down stream in 6.
Find the speed of the stream. Let "x" and "y" be speed upstream and downstream respectively. We can use the above formula and find the following times. Given : The boat covers 24 miles upstream and 36 miles downstream in 6 hours.
Given : The boat covers 36 miles upstream and 24 miles downstream in 6. Adding 1 and 2 , we get,. Subtracting 1 from 2 , we get. Adding 3 and 4 , we get. Speed of the stream is. So, the speed of the stream is 2 mph.. Apart from the stuff given above, if you need any other stuff in Class 10 Upstream Downstream Questions And Answers math, please use our google custom search here. If you have any feedback about our math content, please mail us :. We always appreciate your feedback.
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