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B
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A marzipan factory has two machines producing marzipan. Every day, the two machines operate constantly from 08:00 to 18:00, and produce together N kg of marzipan. What percent of the total amount of marzipan produced by machines W and D together was produced by machine W?
1) Working alone, it takes machine W twenty-five hours to produce (N/2) kg of marzipan.
2) Machine W alone produces (N/2) kg of marzipan in double the time it takes machine D alone to produce N kg of marzipan.
The OA is D.
(2) Machine W alone produces (N/2) kg of marzipan in double the time it takes machine D alone to produce N kg of marzipan.
How is option B sufficient? it doesn't state anything about the time for either machine W or machine D; it only compares the work of two machines.
I feel the answer should be A. Thanks!
1) Working alone, it takes machine W twenty-five hours to produce (N/2) kg of marzipan.
2) Machine W alone produces (N/2) kg of marzipan in double the time it takes machine D alone to produce N kg of marzipan.
The OA is D.
(2) Machine W alone produces (N/2) kg of marzipan in double the time it takes machine D alone to produce N kg of marzipan.
How is option B sufficient? it doesn't state anything about the time for either machine W or machine D; it only compares the work of two machines.
I feel the answer should be A. Thanks!
