A clerical worker takes 3 times as long to finish a job as it does an executive secretary. Working​ together, it takes them 4 hr to finish the job. How long would it take the clerical​ worker, working​ alone, to finish the​ job?

8 hours

Step-by-step explanation:

In 2 hours, the clerical secretary can do 1/4 of the job. (The executive secretary does 3/4 of the job - or 3 times as much - in the same 2 hours.)

Since it takes the clerical secretary 2 hours to do 1/4 of the job, it will take them four times that to do it themselves. 2x4=8.

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