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If Sally can paint a house in 4 hours, and John can paint

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Intern
Intern
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Joined: 02 Jul 2009
Posts: 16

Kudos [?]: 11 [0], given: 12

If Sally can paint a house in 4 hours, and John can paint [#permalink]

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New post 10 Jul 2009, 14:35
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whats the formula for answering this question?



If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together?

A. 2 hours and 24 minutes
B. 3 hours and 12 minutes
C. 3 hours and 44 minutes
D. 4 hours and 10 minutes
E. 4 hours and 33 minutes

Kudos [?]: 11 [0], given: 12

Senior Manager
Senior Manager
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Joined: 25 Mar 2009
Posts: 300

Kudos [?]: 270 [0], given: 6

Re: maths formula [#permalink]

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New post 10 Jul 2009, 15:16
This is not a DS question man. One topic is enough and your answer is there.

re-help-80761.html

Kudos [?]: 270 [0], given: 6

Re: maths formula   [#permalink] 10 Jul 2009, 15:16
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If Sally can paint a house in 4 hours, and John can paint

  post reply Question banks Downloads My Bookmarks Reviews Important topics  


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