Question

Person 1 can do a certain job in fifteen minutes, and person 2 can do the same job in thirty minutes. When completing the job together, which expression would be used to represent the amount of work done by person 1?

Answer 1

where r the expressions??????

Answer 2

1/15,,x/15,,15

Answer 3

In 1 min, person 1 can do work = 1/15

In 1 min, person 2 can do work = 1/30

so i feel it should be 1/15