Question

Bob can do a job in 5 hours while Bill can do the same job in 8. How many hours would it take them, working together, to do this job?

plesa heap

Answer 1

It would take them 13 hours to work together on the job.

Explanation:

Just add 5 hours + 8 hours.

Answer 2

It would take either 13 hours, or there is not enough informatino to solve this problem.