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# Working at their respective constant rates, machine A makes 100 copies

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Intern
Joined: 15 May 2015
Posts: 12
GPA: 3.5
Working at their respective constant rates, machine A makes 100 copies  [#permalink]

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29 Nov 2019, 10:25
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Working at their respective constant rates, machine A makes 100 copies in 12 minutes and machine B makes 100 copies in 15 minutes. If a number of x machine A and a number of y machine B work simultaneously at their respective rates for 2 hours, what is the total number of copies that they will produce?

1) x = y.
(2) 5x + 4y = 90.
Math Expert
Joined: 02 Sep 2009
Posts: 59621
Re: Working at their respective constant rates, machine A makes 100 copies  [#permalink]

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29 Nov 2019, 10:50
esonrev wrote:
Working at their respective constant rates, machine A makes 100 copies in 12 minutes and machine B makes 100 copies in 15 minutes. If a number of x machine A and a number of y machine B work simultaneously at their respective rates for 2 hours, what is the total number of copies that they will produce?

1) x = y.
(2) 5x + 4y = 90.

Discussed here: https://gmatclub.com/forum/working-at-t ... fl=similar
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Re: Working at their respective constant rates, machine A makes 100 copies   [#permalink] 29 Nov 2019, 10:50
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