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Two machines working on a task can complete a job in 2 hours and 5 hours, respectively. How many hours does it take the two machines, working together but independently, to complete the same task?
A) 2/5
B) 7/10
C) 10/7
D) 3/2
E) 5/2
Answer: C
Source: EMPOWERgmat
A) 2/5
B) 7/10
C) 10/7
D) 3/2
E) 5/2
Answer: C
Source: EMPOWERgmat
