Question 1175777
Each bricklayer does 1/(5*7) = 1/35 job per hour (so one bricklayer would take 35hrs to do the job on their own)<br>
Knowing this, 10 bricklayers can do  10/35 job per hour<br>
Thus, the total time for 10 bricklayers to do 1 job is:
1/(10/35) = 35/10 = 3.5hrs