On a certain multiple-choice test, 9 points are awarded for each correct answer, and 7 points are deducted for each incorrect or unanswered question. Sally received a total score of 0 points on the test. If the test has fewer than 30 questions, how many questions are on the test?

Together they can complete the whole job in 6 minutes.

The amount of work done by the slowest person is .

What is time, work done, and rate formula?

The time, work and rate formula is given by

Work  done = time × rate of wok

According to the given question.

One person can do a certain job is 10 minutes.

⇒ The work done in 1 minute  by the first person or the rate of work done by the first person =

Another person can do the same job in 15 minutes.

⇒ The work done in 15 minutes by another person  or the rate of work done by the second person =

So,

The amount of work done by both of them in one minute  

=

⇒ Together they can complete the th part of the work in one minute.

Therefore, together they can complete the whole job in 6 minutes.

As, we know that

Work done = Total time taken × Rate of work done

Since, the second person is taking 15 minutes to complete the jo.

So, he is the slowest person.

Total time total time taken by the two persons to complete the job together is x (given).

Also, the rate of work done by the slowest person =

Therefore,

The amount of work done by the slowest person =

Hence, the amount of work done by the slowest person is .

Find out more information about the work rate here:

brainly.com/question/14305692

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Hi there! :) The answer to your question is 157.08 meters. You do pi*50(because it is the diameter) and that is how you get the answer.

Hope I helped! :D