I will upvote all answers.
One person can do a certain job in ten minutes, and another person can do the same job in fifteen minutes.
How many minutes will they take to do the job together?
- 4 minutes
- 5 minutes
- 6 minutes
One person can do a certain job in ten minutes, and another person can do the same job in fifteen minutes.
How many minutes will they take to do the job together?