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Working alone and at a constant rate, Machine A takes 3 hours to create a widget. Machine B, working alone and at a constant rate, takes x hours to create a widget. Working together, Machine A and B take 12 hours to build two widgets. What is the value of x?

 Mar 16, 2020
 #1
avatar+22085 
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This makes no sense.....'A' working alone can create FOUR widgets in 12 hours......why would adding B slow it down?

 

Is it supposed to be  1/2 hour instead of 12 hours??????

 Mar 16, 2020
 #2
avatar+531 
+1

Working alone and at a constant rate, Machine A takes 3 hours to create a widget. Machine B, working alone and at a constant rate, takes x hours to create a widget. Working together, Machine A and B take 12 hours to build two widgets. What is the value of x?

 

Machine B is 3X slower than machine A

 

3 + x = 12        x = 9  indecision

 Mar 16, 2020

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