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# Just wanted to refresh ..have not touched rate, time,

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CEO
Joined: 15 Aug 2003
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Just wanted to refresh ..have not touched rate, time, [#permalink]  19 Sep 2003, 07:28
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Just wanted to refresh ..have not touched rate, time, distance since forever

Walk rate = 4mph, Run rate = 6mph, whats the average speed of walking 5 mile and run 3 mile

(5+3)/(5/4+3/6)
Manager
Joined: 15 Sep 2003
Posts: 74
Location: california
Followers: 1

Kudos [?]: 6 [0], given: 0

[#permalink]  22 Sep 2003, 08:28
yes it is correct....

the formula is:

total distance/total time=Rate

total distance is 5+3= 8 miles

and the total time is Distance/Rate for each activity:
5/4+3/6

remember D=R*T

so it is: 8/(5/4+3/6)

thanks for the refresher!!
[#permalink] 22 Sep 2003, 08:28
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# Just wanted to refresh ..have not touched rate, time,

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