Variations of GMAT Combined Work Problems

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Jeff Miller, the head GMAT instructor at Target Test Prep, teaches how to efficiently solve 3 variations of GMAT combined work problems.
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Thank you so much for illuminating how to do combined rate problems! I found these so confusing, but now I think I have a solid understanding and systematic approach. Thank you.

yixiuchan
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Thanks for sharing this Jeff.... It has cleared all of my doubts.

sudhansusingh
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Hey, very clear examples! Please do more vids!!! :)

waltersinsonido
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Just did a video on this myself, on my Quant playlist.

TheTestedTutor
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I find using the combined work formula: T = A.B / A+B is easier.

JonesDawg
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hey great job jefff
You have been doing great
Job
Please further upload other concepts videos

Thepinkalchauhan
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great work jeff ! your work is seriously underrated

nopenope
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I love wrokig with charts. They just make sense to me

polar
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Sir..plz give more tough questions ..Thanks for this video..

sapeduworld
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wow, thanks for the explanation! your method is much faster :)

lauragallon
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Very nice videos well done.. do u provide online classes?

guptagurumukh
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Hi Jeff,

How would I use the formula you've mentioned with this problem?

Working together, 7 identical pumps can empty a pool in 6 hours. How many hours will it take 4 pumps to empty the same pool?

simonemendez
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Hello Jeff,
How can we apply the same above formula for the 700 + problem below, Lindsay can paint 1/x of a certain room in 20 minutes.what fraction of the same room can Joseph paint in 20 mins. if the two of them can paint the room in an hour, working together at their respective rates?

nikhilmane