Question 1032863
One person can do a certain job in ten minutes, and another person can do the same job in fifteen minutes. How many minutes will they take to do the job together?
One person's rate:: 1/10 job/hr
Other person's rate:: 1/15 job/hr
--------------
Together rate:: 1/x job/hr
----------------------- 
If x represents how many minutes to do the job together, then how much of the job does the slowest person do?
----------
Equation:
rate + rate = together rate
1/10 + 1/15 = 1/x
15x + 10x = 10*15
-----
25x = 150
x = 6 minutes (time to do the job together)
-------
Cheers,
Stan H.
---------------