<PRE><B>Question 1004498</B>
It takes Jack eight minutes to sweep a porch. Lisa can sweep the same porch in 14 minutes. How long would it take if they worked together?
----
Jack rate:: 1/8 job/min
Lisa rate:: 1/14 job/min
Together rate:: 1/x job/min
------
Equation:
rate + rate = together rate
1/8 + 1/14 = 1/x
----
14x + 8x = 14*8
-------
22x = 14*8
-------
x = 5.09 min = 5min 5.4sec (time to do the job together)
----------------
Cheers,
Stan H.
------------</PRE>