need explanation, rate question

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tacobell: Newbie | Next Rank: 10 Posts; Posts: 8; Joined: Sat May 03, 2008 10:02 pm

by tacobell » Sun May 04, 2008 5:49 pm

6 machines, each working at the same constant rate, together can complete certain job in 12 days. How many additional machines, each working at the same constant rate, will be needed to complete the job in 8 days.

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Thanks in advance.

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Source: Beat The GMAT — Problem Solving | Sun May 04, 2008 5:49 pm

simplyjat: Master | Next Rank: 500 Posts; Posts: 423; Joined: Thu Dec 27, 2007 1:29 amFollowed by: 2 members; Location: Hyderabad, India; Thanked: 36 times; GMAT Score:770

by simplyjat » Sun May 04, 2008 9:17 pm

already discussed https://www.beatthegmat.com/rates-and-work-t1848.html

simplyjat

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