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01 Feb 2018, 23:33
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
69% (02:29) correct
31%
(02:20)
wrong
based on 288
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At a certain printing plant, each of m machines prints 6 newspapers every s seconds. If all machines work together but independently without interruption, how many minutes will it take to print an entire run of 18,000 newspapers?
(A) 180s/m
(B) 50s/m
(C) 50ms
(D) ms/50
(E) 200m/s
(A) 180s/m
(B) 50s/m
(C) 50ms
(D) ms/50
(E) 200m/s
01 Feb 2018, 23:43
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Bunuel
Number of newspapers printed by a machine per second = 6/s
Total number of newspapers printed by m machines per second = (6/s) * m
Total time in mins to print an entire run of 18,000 newspapers = 18,000/(6*m*60 / s) = 50 s/m
Answer B
02 Feb 2018, 00:00
Kudos
Bookmarks
B
one machines produce 6 newspapers every 's' seconds ie in 's/60' minutes. Productivity = 6/(s/60) = 360/s newspapers/minute.
Total productivity of 'm' machines = m*60/s newspapers/minute.
Time taken to print 18000 newspapers = 18000/(m*360/s) = 18000*s/(m*360) = 50s/m minutes
one machines produce 6 newspapers every 's' seconds ie in 's/60' minutes. Productivity = 6/(s/60) = 360/s newspapers/minute.
Total productivity of 'm' machines = m*60/s newspapers/minute.
Time taken to print 18000 newspapers = 18000/(m*360/s) = 18000*s/(m*360) = 50s/m minutes
