comments on: sat math friday: work rate questions - 加拿大vs摩洛哥欧赔 //www.catharsisit.com/hs/sat/sat-math-friday-work-rate-questions/ act, sat, college admissions, life tue, 14 apr 2015 21:10:27 +0000 hourly 1 by: tim //www.catharsisit.com/hs/sat/sat-math-friday-work-rate-questions/#comment-573 sat, 16 aug 2014 23:33:57 +0000 //www.catharsisit.com/sat/?p=2528#comment-573 the page says the following, “working alone and at a constant rate, machine a takes 3 hours to create a widget. machine b, working alone and at a constant rate, takes x hours to create a widget. working together, machine a and b take 12 hours to build two widgets. what is the value of x?”

it should really be saying that working together machine a and b take 12 hours to build six widgets

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