Problema Solution
Mr. Lopez can do a job in 8 days, and his son can do it in 12 days. How long would it take them to do the job if they worked together?
Answer provided by our tutors
let 'x' is the time they need to finish the job together
1/8 + 1/12 = 1/x multiply both sides by 24x
3x + 2x = 24
5x = 24
x = 24/5
x = 4 days 4*24/5 hours = 4 days 19.2 hours
they need 4 days 19.2 hours to finish the job together.