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C
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Difficulty:
15%
(low)
Question Stats:
74% (00:46) correct
26%
(00:40)
wrong
based on 347
sessions
History
Date
Time
Result
Not Attempted Yet
How long does it take Lee to type a certain document?
(1) Lee types at a rate of 45 words per minute.
(2) Typing at a rate of 50 words per minute, Kim can type the document in 1.4 minutes.
(Screenshot of the Question and Explanation)
Screenshot (7).png [ 129.18 KiB | Viewed 7021 times ]
(1) Lee types at a rate of 45 words per minute.
(2) Typing at a rate of 50 words per minute, Kim can type the document in 1.4 minutes.
(Screenshot of the Question and Explanation)
Attachment:
Screenshot (7).png [ 129.18 KiB | Viewed 7021 times ]
23 Jan 2014, 08:16
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How long does it take Lee to type a certain document?
Time = Job/Rate
(1) Lee types at a rate of 45 words per minute. We have the rate only. Not sufficient.
(2) Typing at a rate of 50 words per minute, Kim can type the document in 1.4 minutes --> Job = Rate*Time = 50*1.4 = 70 pages. We have only the amount f the job to be done. Not sufficient.
(1)+(2) We know both the rate and the amount of the job, hence we can get the time needed to complete it. Sufficient.
Answer: C.
Time = Job/Rate
(1) Lee types at a rate of 45 words per minute. We have the rate only. Not sufficient.
(2) Typing at a rate of 50 words per minute, Kim can type the document in 1.4 minutes --> Job = Rate*Time = 50*1.4 = 70 pages. We have only the amount f the job to be done. Not sufficient.
(1)+(2) We know both the rate and the amount of the job, hence we can get the time needed to complete it. Sufficient.
Answer: C.
