Question 630012
I'll set the problem up and leave it to you to solve.
Let t = the time required for Sam to do the job alone
Then Pete takes t - 4 hrs to do the job
Working together their combined rate is:
1/t + 1/(t-4) = 1 job/16 hr = (1/16) jobs/hr
Now you just need to solve for t
I'm getting 30.1 and 34.1 hrs, to the nearest tenth