Darryl es Jesus and James are drywall finishers Darryl can f

Darryl es Jesus and James are drywall finishers Darryl can finish a house in 3 days Jesus can do the same job in 2 days and James requires 1.2 days how many days are required to completely finish 59 tract houses if Darryle,Jesus and James are working together

Solution

Given Darryl can finish a house in 3 days

so he finishes 1/3 work of house in one day

similarly Jesus,James fininshes 1/2,1/1.2 work of house in one day

so total work done in one day = 1/3+1/2 +1/1.2=5/3 work of house

time required to finish work of 59 houses=59/(5/3)=179/5=35 days 19hrs and 12 minutes