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16 Aug 2019, 01:42
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C
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Difficulty:
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Question Stats:
88% (00:51) correct
12%
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It would take one machine 7 hours to complete a large production order and another machine 5 hours to complete the same order. If they can work on the order simultaneously without interfering with each other, how many hours would it take both machines, working simultaneously at their respective constant rates, to complete the order?
A. 12/35
B. 48/35
C. 35/12
D. 40/7
E. 12
A. 12/35
B. 48/35
C. 35/12
D. 40/7
E. 12
16 Aug 2019, 01:42
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Bunuel
It would take one machine 7 hours to complete a large production order and another machine 5 hours to complete the same order. If they can work on the order simultaneously without interfering with each other, how many hours would it take both machines, working simultaneously at their respective constant rates, to complete the order?
A. 12/35
B. 48/35
C. 35/12
D. 40/7
E. 12
A. 12/35
B. 48/35
C. 35/12
D. 40/7
E. 12
Similar question to practice from OG: https://gmatclub.com/forum/it-would-tak ... 44263.html
16 Aug 2019, 01:56
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Individual Rates :
R(a) = 1/7 R(b) = 1/5
Rate working together :
1/7+1/5 = 35/12
IMO Ans : C
R(a) = 1/7 R(b) = 1/5
Rate working together :
1/7+1/5 = 35/12
IMO Ans : C
