
Jessica G.
asked 12/05/22if the speed of the river is r, write an expression for the time it takes to trsvel 5 kilometers upstream and an expression for the time it takes to travel 10 kilometers downstream
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1 Expert Answer
Richard C. answered 12/05/22
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Confidence-building Algebra 2 tutor with 18 years experience
Let s = speed of the boat in still water
upstream t=5/(s-r)
downstream t=10/(s+r)
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Bradford T.
What is the speed of the boat (b) in no current? The resulting speed would be b-r and b+r which would be needed for the upstream and downstream time expressions.12/05/22