michellewilliam michellewilliam

23-09-2014
Mathematics

Answered

fran swims at a speed of 2.6mph in stillwater the river flows at a speed of 0.4mph how long will it take her to swim 4.4mi upstream and 4.4mi downstream_. PLEASE HELP!!

Answer :

AndyBryer AndyBryer

23-09-2014

Her speed will be affected by the speed of the river therefore her speed upstream will be 2.6-0.4 mph and her speed downstream will be 2.6+0.4mph
Therefore upstream it will take 4.4/2.2=2 hours
And downstream it will take 4.4/3=1.47 hours (3sf)

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