A bottle-capping machine caps bottles per minute. How many minutes does the machine take to cap bottles?
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Wait, is it really just 30/12? Got 2.5 but feels too easy for a GMAT question lol
Got 2.5, took me like 10 seconds. Nice confidence boost after the last few rate problems destroyed me
Just divide bottles by bottles per minute = 30/12 = 2.5. Answer choice A matches
Can someone explain why it's not 12/30? I always flip the fraction and mess up which goes on top
What it tests
Your ability to combine individual work rates, usually by working with the fraction of a job completed per unit of time.
Common trap
Adding the times instead of the rates, or forgetting to take the reciprocal when combining rates.