Question 56497
Barry's capacity is {{{1/3}}} job/hr
Sanchez's capacity is {{{1/5}}} job/hr

Let the time needed for both of them to do one job = T

({{{1/3+1/5}}})*T=1  --> Both them work together to finish 1 job

{{{(8/15)}}}*T=1
T={{{(15/8)}}}hr