Question

A can do a job in 9/2 days, and B in 9 days. How long will they take to complete the job together?

Answer 1

Answer:

A=9/2 , B=9

9/2+9=27/2

Answer 2

Answer:

9/2:9

9/2:18/2

4.5/9

1/2

therefore 3 days