Question

Medal to the correct answer!!!

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 min
5 min
6 min

Answer 1

I think it's 5 but idk.

Answer 2

Ur close...
A can do the job in 10 minutes
or, In 1 minute, A can do 1/10 of the job.
B can do the job in 15 minutes
or, In 1 minute, B can do 1/15 of the job.

Together, in 1 minute they can do 1/10+1/15 = 1/6 of the job.

So, it would take 6/1 = 6 minutes to finish the job if they both work together.

Answer 3

Thank you!

Answer 4

Ur welcome