On Thursday afternoon, two machines, J and R, ran continuously at

Question

On Thursday afternoon, two machines, J and R, ran continuously at uniform rates to fill a production order. How long did it take them to fill the order?

(1) The machine began filling the order at 3 p.m.
(2) The machine had filled 1/2 of the order by 3:46 p.m.

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ManifestDreamMBA · Answer

It seems something is missing in this question. Prompt mentions 2 machines but the statements talk about the machine - we don't know which one. Even if we say that it's say J, then we have no info on R

If it is intentional, I would go with E as no info on the "other machine" is provided.

OR if the statements meant machine s  then the answer would be C, as we are given two machines, J and R, ran continuously at uniform rates to fill a production order and we got the rate of both together

kingbucky · Answer

Let’s determine if we can find  how long machines J and R took  to fill a production order.

The stem states machines J and R work at uniform rates to fill an order, and we need the total time taken.  
     Source   
   Information Provided   
   Sufficiency   
 
    Question Stem   
   Machines J and R fill an order at uniform rates.   
   Insufficient, as no start time, end time, or rates are given.   
 
    Question Stem + Statement 1   
   Machines began filling the order at 3 p.m.   
   Insufficient, as the end time or rate of work is unknown.   
 
    Question Stem + Statement 2   
   Half the order was filled by 3:46 p.m.   
   Insufficient, as the start time or total time is not provided.   
 
    Question Stem + Statements 1 + 2   
   Start time at 3 p.m., half the order filled by 3:46 p.m.   
   Sufficient. The time to fill half the order (from 3 p.m. to 3:46 p.m.) allows us to determine the rate, and thus the time for the full order, assuming uniform rates.

C  ombining both statements provides the start time and the time to complete half the order, enabling us to find the total time.

Answer: C

On Thursday afternoon, two machines, J and R, ran continuously at

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Source	Information Provided	Sufficiency
Question Stem	Machines J and R fill an order at uniform rates.	Insufficient, as no start time, end time, or rates are given.
Question Stem + Statement 1	Machines began filling the order at 3 p.m.	Insufficient, as the end time or rate of work is unknown.
Question Stem + Statement 2	Half the order was filled by 3:46 p.m.	Insufficient, as the start time or total time is not provided.
Question Stem + Statements 1 + 2	Start time at 3 p.m., half the order filled by 3:46 p.m.	Sufficient. The time to fill half the order (from 3 p.m. to 3:46 p.m.) allows us to determine the rate, and thus the time for the full order, assuming uniform rates.

GMAT Data Sufficiency (DS) Questions

On Thursday afternoon, two machines, J and R, ran continuously at

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My Rewards