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My friend sets out walking at a speed of 3 miles per hour. I set out behind her 5 minutes later at 4 miles per hour.

For how many minutes will my friend have been walking when I catch up to her?

 Jan 13, 2020
 #1
avatar+20254 
+3

Your friend has a head start   3 m/hr  5/60 = 1/4 mile

 

at the difference in your speeds   4 - 3 = 1 mph

    it will take   1/4 mile / 1 m/hr = 1/4 hr    (15 minutes ) to catch up to her...    PLUS the 5 minutes she was walking before you started = 20 minutes

 Jan 13, 2020
edited by ElectricPavlov  Jan 13, 2020
edited by ElectricPavlov  Jan 13, 2020
 #2
avatar+36 
-2

But it still says its wrong

Paresh247  Jan 13, 2020
 #3
avatar+20254 
+2

Yah, it is wrong....I fixed it.....

 Jan 13, 2020

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