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?

A.1/15
B.x/15
C.15
pls asap

Answer 1

the answer to this is b hope helps i dont really know

Answer 2

The detailed answer is
Let time taken by first person =x
So x = 15
Let time taken by next two persons be y
So 2y=30 or y=15
So x= y = 15
Time taken = 1/x=1/y=1/15
Answer is a