A furniture factory can box a desk chair in 15 seconds. what is the rate per minute

It is important to carefully look at all the information's that are given in the question. based on those information's the answer to the question has to be deduced. One important aspect for doing this problem is converting 1 minute into 60 seconds and then start solving.

In 15 seconds a the number of desk chairs a furniture factory can box = 1

In 60 seconds a the number of

desk chairs a furniture factory can box = (1/15) * 60

                                                              = 4 chairs