Problema Solution
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?
Answer provided by our tutors
Person A: 1 job/10 minutes
Person B: 1 job/15 minutes
If they worked together: A + B
1/10 +1/15 = 3/30 + 2/30 = 5/30 = 1/6
Then they can do 1/6 of the job per minute, so they can do 1 job in 6 minutes together.