GMATprep PS question
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R works for 36 hours. (Finishes 1/36 th of a job in 1 hr)
S works for 18 hrs. (Finishes 1/18 th of a job in 1 hr)
Hence R finishes - 1/18th of a job in 2 hrs
S finishes - 1/9 th of a job in 2 hrs
Let the machines be x in number.
x/9 + x/18 = 1
Solve for x.
x = 6
S works for 18 hrs. (Finishes 1/18 th of a job in 1 hr)
Hence R finishes - 1/18th of a job in 2 hrs
S finishes - 1/9 th of a job in 2 hrs
Let the machines be x in number.
x/9 + x/18 = 1
Solve for x.
x = 6
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- Master | Next Rank: 500 Posts
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