SOLUTION: Letha walkeds feet away at y feet per minute and arrived at the library 10 minutes late. How fast should she have walked to arrived on time? Please show complete answer w/ steps

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Question 1152511: Letha walkeds feet away at y feet per minute and arrived at the library 10 minutes late. How fast should she have walked to arrived on time?
Please show complete answer w/ steps please and thanks!
Answer by josgarithmetic(39630)   (Show Source): You can put this solution on YOUR website!
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Letha walked s feet away at y feet per minute and arrived at the library 10 minutes late. How fast should she have walked to arrived on time?
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Not sure this is best approach
not sure I understand the description correctly but,..

y, speed as done
y+k, some wanted higher speed
s, distance to get to library 
            SPEED    TIME    DISTANCE

LATE           y      s/y       s

ON TIME       y+k     s/(y+k)   s

DIFFERENCE             10

WANT TO KNOW


-
Solving for ,

--------the normal speed
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