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If 6 machines ran at the same constant rate, they can compl
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07 Feb 2020, 04:40
07 Feb 2020, 04:40
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Question Stats:
87% (03:12) correct
12% (00:00) wrong based on 8 sessions
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If 6 machines ran at the same constant rate, they can complete a certain job in 8 hours. If only 5 of these machines run at this rate, how many more minutes will be required to complete the same job?
(A) 38
(B) 72
(C) 80
(D) 90
(E) 96
(A) 38
(B) 72
(C) 80
(D) 90
(E) 96
Re: If 6 machines ran at the same constant rate, they can compl
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07 Feb 2020, 11:21
07 Feb 2020, 11:21
1
Expert Reply
6 machines in 8 hours = 6*8= 48 machine-hours
5 machines will take = 48/5= 9.6 hrs
so 1.6hrs more or \(\frac{8}{5}\) hrs = \(\frac{8*60}{5} mins = 96mins\)
5 machines will take = 48/5= 9.6 hrs
so 1.6hrs more or \(\frac{8}{5}\) hrs = \(\frac{8*60}{5} mins = 96mins\)
Re: If 6 machines ran at the same constant rate, they can compl
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21 Feb 2023, 23:50
21 Feb 2023, 23:50
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