SOLUTION: Photocopier A makes 180 copies in 3 min & photocopier B can make 180 copies in 2 min. With both photocopiers working, how long will it take to make 180 copies. Photocopier A makes

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Question 1097552: Photocopier A makes 180 copies in 3 min & photocopier B can make 180 copies in 2 min. With both photocopiers working, how long will it take to make 180 copies.
Photocopier A makes 60 copies in 1 min
Photocopier B makes 90 copies in 1 min.
Photocopier A and B working together, they make 150 copies in 1 min.
1 copy takes ___ min, 180 copies take ___ min.
It will take _______ to make 180 copies.
Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52781)   (Show Source): You can put this solution on YOUR website!
.
First three lines of your solution are correct.


Last two lines are not relevant. Erase them.


The last line to add to your solution is  


time =  = 1 minute and 12 seconds.


See the lesson
    - Special joint work problems that admit and require an alternative solution method
in this site.


Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
Combined rate for copiers A and B:





-

How much time for 180 copies?



or
about 1 minute and 12 seconds
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