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Anna ran to her friend's house at a rate of 8 miles per hour. On the way back, she ran the same route in reverse, but she ran at a rate of 6 miles per hour. If Anna's route is one mile long each way, how many minutes longer did it take her to run back from her friend's house than it took her to run to her friend's house? Express your answer as a decimal to the nearest tenth.

 Apr 2, 2020
 #2
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 It  must  have  taken  (1/8) hr  to  run  one way  and (1/6)  of  an  hour  to  run  the other way

 

So

 

1/6  -  1/8  =

 

[  8  - 6  ]   / 48  =

 

2  /  48  = 

 

1/24  hour longer =     60 (1/24)  =  60/24   =  5/2  min   =  2.5  minutes

 

 

cool cool cool

 Apr 2, 2020

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