Question

two men working together can complete a job in 1 hour 20 minutes. the first man working alone can complete the task in two hours. how long will it take the second man to finish the job if he worked alone

Answer 1

Second Man = (2 Hours * 1.3333 Hours) / (2 Hours - 1.3333 Hours)

Second Man = (2.6666666667 ) / (.666666667)

Second Man (when working alone) = 4 Hours

Explanation: