An industrial machikne is able to make 9 pens in 3 seconds. What is the rate made per second?
1 answer:
This problem can be solved using proprtions. Once you set up the proportion, the calculations are easy.
Let x = number of pens made in 1 second.
Now, you just cross multiply and solve.
9 = 3x
x = 3
The rate is 3 pens per second.
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