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My friend sets out walking at a speed of 3 miles per hour. I set out behind her \(8\) minutes later at 4 miles per hour. For how many minutes will my friend have been walking when I catch up to her?

 May 22, 2022
 #1
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Let her time in hours==T

 

3T =4[T + 8/60], solve for T

 

T ==8/15  x  60 ==32 minutes - she was walking when you caught up.

 

32  -  8==24 minutes that you walked.

 May 22, 2022
 #2
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3T =4[T + 8/60], solve for T

The above line should read:

 

3T =4[T - 8/60], solve for T

Guest May 22, 2022

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