Question 875418
The 1000 people surveyed is just the 1 job.  This is a uniform rates task completion problem.  RT=J.  rate, time, job.


{{{highlight_green(1/(t-9)+1/t=1/20)}}}.
The sum of the rates of the two teams is the total rate of the two teams together.  The numerator of 1 is for 1 job.  t-9 is the time for the first mentioned team and t is time for the second mentioned team.  


Solve for t, and use it to find the rate of each team.