Question 1063407

If he does the job in 1 hr he can do 1/1 = 1 job per hour
If he does the job in 2 hrs he can do 1/2 = 1/2 job per hour
--
The pattern is if x hours to do the job, he does 1/x job per hour.
--
1.  If he takes 5 hours, he can do 1/5 job per hour
--
I'll let you finish, it will be more rewarding for you if you finish it.