Question 1179401
Peter and Steven take 5 1/3 hours to do a job.===> 16/3 hours

In 1 hour they do 3/15 of the job

Steven does the same job alone in16 hours
So he does 1/16 of job in 1 hour

Let peter take x hours to do the job alone
he does 1/x of the job in 1 hour

1/x + 1/16 = 3/15

1/x = 3/15 -1/16

1/x = 16*3- 15/15*16

1/x =33/15*16
x 15*16/33
=7.23 hours

 peter take 7.23 hours to do the job alone