Lesson: Challenging Problem Solving - 18t09

Rates: The Rate Formula And Unit Conversion

[Page 18 of 37]

The following problem illustrates the use of the basic rate formula and the importance of unit conversions. Review the question and then proceed to the task below.

If a centrifuge spins at a rate of k rotations per second, how many minutes would it take for the centrifuge to make n rotations?
60kn

For each question that follows, select the correct answer and then click Continue.

Which of the following components of the rate formula does this question ask us to find?
  Rate Distance (productivity) Time

Which of the following rate formula variants is most convenient to use in solving this problem?
  Distance = Rate Time
Now apply the variables provided in the question stem to the formula. Type your answers into the boxes below, making certain to include units as well. Click Continue when you're done.

Which of the following components of the rate formula does this question ask us to find?
=
____________________

Now review our formula. We have solved for time, but are all units consistent?

  yes no    

Modify the formula below to make all units consistent. Enter your responses into the boxes below and then click Continue.

Which of the following components of the rate formula does this question ask us to find?
=
____________________


Since there are 60 seconds in a minute, we simply multiply the current rate, r/p/sec, by 60 to convert to r/p/min. Choice (B) is correct.
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