Question 403133
Prince------------ 6 hours------------- 1/6 of job in 1 hour
Sam-------------4 hours--------------1/4 of the job in 1 hour
..
TOGETHER They do
1/6 + 1/4 
= (4+6)/24
10/24 of the job in 1hour
So they will take 24/10 hours = 2.4 hours

OR 2 Hours 24 minutes