Question

You can do one-half of a job in you can do one half of a job in a an hour. Your friend can do one-third of the same job in an hout How long will take to do the job if you work together?

te your answer as a decimal

Answer 1

• 1.2 hours

Explanation:

Let the amount of the job is x.

You can do 1/2x in an hour.

Your friend can do 1/3x in an hour.

Together you can do:

• 1/2x + 1/3x = 5/6x of a job in an hour

You need time to finish the job:

• x ÷ 5/6x = 6/5 = 1.2 hours