x men y work

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maihuna: Legendary Member; Posts: 1578; Joined: Sun Dec 28, 2008 1:49 amFollowed by: 9 members; Thanked: 82 times; GMAT Score:720

by maihuna » Mon May 04, 2009 10:17 am

If x men working x hrs/day can do x units of work in x days, then y men working y hrs/day would be able to complete how many units of works in y days:

x^2/y^3
x^3/y^2
y^2/x^3
x^2/y^3
y^3/x^2
x/y^3

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Source: Beat The GMAT — Problem Solving | Mon May 04, 2009 10:17 am

PussInBoots: Master | Next Rank: 500 Posts; Posts: 157; Joined: Tue Oct 07, 2008 5:47 am; Thanked: 3 times

by PussInBoots » Mon May 04, 2009 11:51 am

P = how much of 1 unit of work can 1 worker finish in 1 hour, unit / (worker * hour)

We have: P * x hrs/day * x days * x workers = x units, hence P = 1 / x^2
We need to find: P * y hrs/day * y days * y workers = y^3 / x^2

"y^3/x^2" is the answer

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maihuna: Legendary Member; Posts: 1578; Joined: Sun Dec 28, 2008 1:49 amFollowed by: 9 members; Thanked: 82 times; GMAT Score:720

by maihuna » Tue May 05, 2009 5:32 am

PussInBoots wrote:P = how much of 1 unit of work can 1 worker finish in 1 hour, unit / (worker * hour)

We have: P * x hrs/day * x days * x workers = x units, hence P = 1 / x^2
We need to find: P * y hrs/day * y days * y workers = y^3 / x^2

"y^3/x^2" is the answer

Hi puss , nope thats not correct...

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2010gmat: Master | Next Rank: 500 Posts; Posts: 371; Joined: Fri Mar 06, 2009 2:48 am; Thanked: 27 times; GMAT Score:740

by 2010gmat » Tue May 05, 2009 6:12 am

i believe puss is right...y^3/x^2 shud be the ans

is there any catch??

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lilu: Master | Next Rank: 500 Posts; Posts: 148; Joined: Wed Dec 10, 2008 5:13 pm; Location: SF, CA; Thanked: 12 times

by lilu » Tue May 05, 2009 6:19 am

2010gmat wrote:i believe puss is right...y^3/x^2 shud be the ans

is there any catch??

Same here, don't see why y^3/x^2 is not the answer....

The more you look, the more you see.

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maihuna: Legendary Member; Posts: 1578; Joined: Sun Dec 28, 2008 1:49 amFollowed by: 9 members; Thanked: 82 times; GMAT Score:720

by maihuna » Tue May 05, 2009 7:43 am

Ohh sorry met it is fine, puss putted corret, sorry for confusion

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