A glassblower can produce a set of simple glasses in about 2 h. When the glassblower works with an apprentice, the job takes about 1.5 h. How long would it take the apprentice to make a set of glasses when working alone?

6 hours.

Step-by-step explanation:

Let t represent the time taken by apprentice in hours to make a set of glasses when working alone.  

Part of work completed by apprentice in one hour would be .

We have been given that a glassblower can produce a set of simple glasses in about 2 hours. So part of work completed by glassblower in one hour would be .

While working together, the job takes about 1.5 hours. So part of work completed by both in one hour would be .

Now we will equate sum of work competed by both in hour by work completed by both working together is one hour as:

Therefore, it will take 6 hours for the apprentice to make a set of glasses when working alone.

step-by-step explanation:

step-by-step explanation: